Devices

Pairon Solutions LLC

FDA issued a warning letter to Pairon Solutions LLC (Portland, OR, United States) on Aug 9, 2021, citing 21 CFR 807.39. Subject: Investigational Device Exemptions (IDE), Premarket Approval Application (PMA) Adulterated Device.

From the letter: “Statements made alongside an image of the Arun KN95 Folding Face Mask that it is “listed on FDA EUA for Non-NIOSH Devices” and representing compliance with “GB2626-2006””

Portland, OR, United StatesIssued Aug 9, 2021Posted Oct 5, 2021No close-out recorded

At a glance

What a reviewer notes before reading: findings, citations, the response deadline and what the letter warns of.

Violations
12 findings · 2 issue types
Response due
Fifteen (15) business days of receipt
FDA asks for
4 actions
Named as possible actions
None named
Issued by
Center for Devices and Radiological Health
Published status
No close-out recorded

AI assisted findings

Model-assisted reading of each issue. Open one to see the FDA text it comes from, and check it against the full letter.

01Labeling, claims & marketingThe firm marketed KN95 masks with claims of FDA EUA listing and compliance with a standard.
Statements made alongside an image of the Arun KN95 Folding Face Mask that it is “listed on FDA EUA for Non-NIOSH Devices” and representing compliance with “GB2626-2006”
02Labeling, claims & marketingThe firm marketed surgical masks with claims of bacterial efficiency and ASTM compliance.
Statements alongside an image of the Deming Surgical Mask that it provides “99% bacterial efficiency” and “complies ASTM F2100”.
03Labeling, claims & marketingThe firm marketed 3-ply face masks with claims of bacterial filtration efficiency.
Statements made on the packaging and alongside the images of the Pairon 3Ply Face Mask (Blue, White & Black) that they provide “>95% bacterial efficiency” and “helps filter out … bacteria”
04Labeling, claims & marketingThe firm implied the masks were suitable for nursing home use.
Statements on your firm’s customer blog page representing that the BLUE – Pairon 3Ply Face Mask has been supplied to nursing home facilities
05Registration, listing & premarketThe firm failed to provide premarket notification to FDA before marketing the devices.
These products are also misbranded under section 502(o) of the Act, 21 U.S.C. § 352(o), because your firm did not notify the agency of its intent to introduce the devices into commercial distribution, as required by section 510(k) of the Act, 21 U.S.C. § 360(k).
06Labeling, claims & marketing · 21 CFR 807.39The firm falsely claimed FDA certification and used the FDA logo on packaging.
Representations that the Arun KN95 Folding Face Masks are “Certified: … FDA” and unauthorized display of what appears to be FDA’s logo*1* on inner packaging of the product
07Labeling, claims & marketing · 21 CFR 807.39The firm falsely claimed FDA certification and used the FDA logo on packaging.
Representations that the Deming Surgical Masks are “Certified: FDA” and unauthorized display of what appears to be FDA’s logo on packaging
08Labeling, claims & marketing · 21 CFR 807.39The firm falsely claimed FDA registration for the masks.
Representations that Pairon 3Ply Face Masks (Blue, White & Black) are “FDA Registered”
09Labeling, claims & marketing · 21 CFR 807.39The firm displayed the FDA logo without authorization.
Unauthorized display of what appears to be FDA’s logo alongside the BLACK – Pairon 3Ply Face Mask
10Labeling, claims & marketing · 21 CFR 807.39The firm displayed a misleading certificate implying FDA registration and approval.
Displaying a “Certificate of FDA Registration” issued by “UCL-REGSERVICE INC” (UCL-REGSERVICE Certificate) alongside Arun KN95 Folding Face Mask product information.
11Labeling, claims & marketing · 21 CFR 807.39The firm displayed a misleading certificate implying FDA registration and approval.
Displaying a “Certification of Registration” issued by “Sungo Technical Services Inc.” (Sungo Technical Certificate) alongside Deming Surgical Mask product information.
12Labeling, claims & marketing · 21 CFR 807.39The firm displayed a misleading certificate implying FDA registration and approval.
Displaying a “Certification of Registration” issued by “Wayborn Quality & Technology Services” (Wayborn Certificate) alongside the BLUE – Pairon 3Ply Face Mask product information.

What FDA requested

  • Notify FDA in writing within 15 business days of steps taken to address violations
  • Provide documentation of any actions taken to correct violations
  • Provide a timetable for implementation of planned corrective actions
  • Explain how the firm plans to prevent similar violations in the future

FDA Warning Letter

38 paragraphs · 1 section

Text as published on FDA.gov, retrieved Sep 8, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)

1WARNING LETTER

24 paragraphs

DATE: August 9, 2021 Re: “Arun KN95 Folding Face Mask,” “Deming Surgical Mask,” and “Pairon 3Ply Face Mask” (Blue, White & Black)

This is to advise you that the United States Food and Drug Administration (FDA) reviewed your website at the Internet address https://www.paironsolutionsppe.com/ on July 14, 2021. The FDA has observed that your website offers the “Arun KN95 Folding Face Mask,” the “Deming Surgical Mask”, and the “Pairon 3Ply Face Mask” (Blue, White & Black) for sale in the United States. Based on our review, these products are devices because they are intended for use in the diagnosis of disease or other conditions or in the cure, mitigation, treatment, or prevention of disease, or to affect the structure or any function of the body, and thus, are devices under section 201(h) of the Federal Food, Drug, and Cosmetic Act (the “Act”), 21 U.S.C. § 321(h).

FDA’s review of your website revealed the following statements that establish that the Arun KN95 Folding Face Mask, Deming Surgical Mask, and Pairon 3Ply Face Mask (Blue, White & Black) are intended for the mitigation, prevention, treatment, diagnosis, or cure of disease, including but not limited to:

Statements made alongside an image of the Arun KN95 Folding Face Mask that it is “listed on FDA EUA for Non-NIOSH Devices” and representing compliance with “GB2626-2006” [https://www.paironsolutionsppe.com/products/kn95-mask]

Statements alongside an image of the Deming Surgical Mask that it provides “99% bacterial efficiency” and “complies ASTM F2100”. The name also incorporates the word “surgical” as well as “medical” written on the box packaging [https://www.paironsolutionsppe.com/products/surgical-mask]

Statements made on the packaging and alongside the images of the Pairon 3Ply Face Mask (Blue, White & Black) that they provide “>95% bacterial efficiency” and “helps filter out … bacteria” [https://www.paironsolutionsppe.com/products/general-use-facemask], [https://www.paironsolutionsppe.com/products/copy-of-pairon-3ply-face-mask-black], [https://www.paironsolutionsppe.com/products/white-pairon-3ply-face-mask]

Statements on your firm’s customer blog page representing that the BLUE – Pairon 3Ply Face Mask has been supplied to nursing home facilities [https://www.paironsolutionsppe.com/blogs/news]

Based on our review, your website is offering for sale in the United States, the Arun KN95 Folding Face Mask (which your website represents is manufactured by Dongguan Arun Industrial Co. Ltd.), the Deming Surgical Mask (which your website represents is manufactured by Xiantao Deming Healthcare Products Co., Ltd.), and the Pairon 3Ply Face Mask - Blue, White & Black (which your website represents is manufactured by Wuxi Hingdou Sports Co., Ltd) without marketing approval or clearance from the FDA. Accordingly, these products are adulterated under section 501(f)(1)(B) of the Act, 21 U.S.C. § 351(f)(1)(B), because your firm does not have an approved application for premarket approval (PMA) in effect pursuant to section 515(a) of the Act, 21 U.S.C. § 360e(a), or an approved application for an investigational device exemption (IDE) under section 520(g) of the Act, 21 U.S.C. § 360j(g). These products are also misbranded under section 502(o) of the Act, 21 U.S.C. § 352(o), because your firm did not notify the agency of its intent to introduce the devices into commercial distribution, as required by section 510(k) of the Act, 21 U.S.C. § 360(k).

In addition, these products are misbranded under section 502(a) of the Act, 21 U.S.C. § 352(a), because their labeling is false or misleading. FDA registration of a device establishment or assignment of a registration number does not denote FDA approval of the establishment or the device. Thus, references to a firm’s establishment registration and registration number that create an impression of official FDA approval, clearance, authorization, certification, endorsement or other evaluation of the establishment or the devices are misleading and constitute misbranding. See 21 CFR 807.39.

Your website contains a number of false or misleading representations, including but not limited to:

Representations that the Arun KN95 Folding Face Masks are “Certified: … FDA” and unauthorized display of what appears to be FDA’s logo1 on inner packaging of the product [https://www.paironsolutionsppe.com/products/kn95-mask]

Representations that the Deming Surgical Masks are “Certified: FDA” and unauthorized display of what appears to be FDA’s logo on packaging [https://www.paironsolutionsppe.com/products/surgical-mask]

Representations that Pairon 3Ply Face Masks (Blue, White & Black) are “FDA Registered” [https://www.paironsolutionsppe.com/products/general-use-face-mask] [https://www.paironsolutionsppe.com/products/copy-of-pairon-3ply-face-mask-black][https://www.paironsolutionsppe.com/products/white-pairon-3ply-face-mask]

Unauthorized display of what appears to be FDA’s logo alongside the BLACK – Pairon 3Ply Face Mask [https://www.paironsolutionsppe.com/products/copy-of-pairon-3plyface-mask-black]

Displaying a “Certificate of FDA Registration” issued by “UCL-REGSERVICE INC” (UCL-REGSERVICE Certificate) alongside Arun KN95 Folding Face Mask product information. The UCL-REGSERVICE Certificate “certifies that Dongguan Arun Industrial Co. Ltd., …has completed the FDA Establishment Registration and Device Listing with the US Food & Drug Administration…” The UCL-REGSERVICE Certificate has the look of an official government document, and incorporates unauthorized use of the FDA logo1 and an illustration of an eagle with a U.S. flag (or a similar flag) [https://www.paironsolutionsppe.com/products/kn95-mask]

Displaying a “Certification of Registration” issued by “Sungo Technical Services Inc.” (Sungo Technical Certificate) alongside Deming Surgical Mask product information. The Sungo Technical Certificate “certifies that Xiantao Deming Healthcare Products Co., Ltd., … has completed the FDA Establishment Registration and Device Listing with the US Food & Drug Administration…” The Sungo Technical Certificate has the look of an official government document, and incorporates unauthorized use of the FDA logo and an illustration of an eagle with a U.S. flag (or a similar flag) [https://www.paironsolutionsppe.com/products/surgical-mask]

Displaying a “Certification of Registration” issued by “Wayborn Quality & Technology Services” (Wayborn Certificate) alongside the BLUE – Pairon 3Ply Face Mask product information. The Wayborn Certificate “certifies that … Wuxi Hingdou Sports Co., Ltd., …has completed U.S. FOOD And DRUG Administration Medical Device Registration…” The Wayborn Certificate has the look of an official government document and incorporates unauthorized use of the FDA logo and an illustration of an eagle with a U.S. flag (or a similar flag). [https://www.paironsolutionsppe.com/products/general-use-face-mask]

To date, FDA has not cleared, approved, authorized or “Certified” the Arun KN95 Folding Face Mask or the Deming Surgical Mask offered for sale by your firm, and so statements to the contrary are false. In addition, display of the FDA logo on packaging and near images of and information about the Arun KN95 Folding Face Mask, the Deming Surgical Mask, and the Pairon 3Ply Face Mask (Blue, White & Black), combined with statements such as, “Certified: FDA” and “FDA Registered”, are misleading because it creates the impression of official FDA approval, clearance, authorization, certification, endorsement, or other evaluation of the devices and/or your establishment.. The UCL-REGSERVICE Certificate bearing the FDA logo, positioned near images of and information about the Arun KN95 Folding Face Mask is misleading because it implies FDA approval, clearance, authorization, certification, endorsement, or other evaluation of the product and/or establishment based on the representations that Dongguan Arun Industrial, Co., Ltd. is or was registered with FDA and that the firm is or was in possession of a registration number. In addition, the display of Sungo Technical Certificate bearing the FDA logo positioned near images of and information about the Deming Surgical Mask is misleading because such display implies FDA approval, clearance, authorization, certification, endorsement, or other evaluation of the product and/or establishments based on the existence of Xiantao Deming Healthcare Products Co., Ltd. registration and possession of a registration number. Furthermore, display of the Wayborn Certificate bearing the FDA logo, near information about the BLUE – Pairon 3Ply Face Mask is misleading because such display implies FDA approval, clearance, authorization, certification, endorsement, or other evaluation of the product and/or establishments based on the existence of Wuxi Hingdou Sports Co., Ltd registration and possession of a registration number. Although the Arun KN95 Folding Face Mask, Deming Surgical Mask, and BLUE – Pairon 3Ply Face Mask Certificates contain legible language that appears to be intended to function as a disclaimer, including a statement that the Certificates do not denote FDA endorsement or approval, statements that FDA does not issue or recognize certificates of registration, and a statement that quotes 21 CFR 807.39, the small font size and overall placement of such language could be easily overlooked and does not limit or otherwise mitigate the misleading impression created by the use of the Certificates. Such representations are especially concerning from a public health perspective because consumers rely on information provided by sellers to determine whether to purchase a device and your presentation conveys the misimpression that the products have been reviewed and approved by FDA.

We remind you that FDA’s Center for Devices and Radiological Health (CDRH) does not issue device registration certificates to medical device establishments, including to sellers and manufacturers. When an establishment registers and lists its devices, the resulting entry in FDA’s Establishment Registration & Device Listing Database merely denotes that the establishment has provided certain information to FDA.

This letter is not meant to be an all-inclusive list of violations that exist in connection with the products or your operations. It is your responsibility to ensure that the products you sell are in compliance with the Act and its implementing regulations. We advise you to review your website, product labels, and other labeling and promotional materials to ensure that you do not make representations that misbrand the product(s) in violation of the Act.

Response requested

This letter notifies you of our concerns and provides you with an opportunity to address them. Please notify this office in writing within fifteen (15) business days from the date you receive this letter of the specific steps your firm has taken to address the noted violations, as well as an explanation of how your firm plans to prevent these violations, or similar violations, from occurring again. Include documentation of any actions your firm has taken. If your firm’s planned actions will occur over time, please include a timetable for implementation of those activities. Your firm’s response should be comprehensive and address all violations included in this letter. If you believe that the products are not in violation of the Act, include your reasoning and any supporting information for our consideration.

Your firm’s response should be sent via email to CDRHWarningLetterResponses@fda.hhs.gov or by mail to:

Food and Drug Administration Center for Devices and Radiological Health Office of Regulatory Programs Division of Regulatory Programs 2: Establishment Support Regulatory Inspections and Audits Team White Oak Building 66 10903 New Hampshire Ave. Silver Spring, MD 20993

Refer to the Document number CMS Case# 616392 or CTS Number CPT2001233 when replying. We remind you that only written communication is considered as official. If you have any questions about the contents of this letter, please contact: Assistant Director, Paola Barnett at 301-796-5462 or Paola.Barnett@fda.hhs.gov.

Sincerely, /S/

Donna Engleman, MS, BSN Director Division of Market Intelligence Office of Regulatory Programs Office of Product Evaluation and Quality Center for Devices and Radiological Health

Cc:

Yabo Zhang Dongguan Arun Industrial, Co., Ltd. NO.18Xingfeng St, Changlong, Huangjiang Dongguan, CN 523766

US Agent: Simcal UCL-REG SERVICE INC. 3907 Prince Street Suite 6F Flushing, NY 11354 Email: gbstandard@163.com

UCL-Reg Service 602 ROCKWOOD ROAD, WILMINGTON New Castle, DE, 19802

XIANTAO DEMING HEALTHCARE PRODUCTS CO., LTD. No.198, Pengchang Ave. Pengchang Town, Xiantao City Hubei Province, P.R. China Xiantao, CN 433018

Leeyeo Kee Regrek LLC 19 Holly Cove Ln. Dover, DE 19901 Email: regrek.cs@hotmail.com

Sungo Technical Services Inc. 6050 W Eastwood Ave Apt. 201 Chicago Illinois 60630 E-mail:sungo.group@yahoo.com Email: Shage2008@126.com

WUXI HINGDOU SPORTS CO., LTD Hongdou Industrial Park, Donggang Town Wuxi, Jiangsu, 214000, China

Director: Crane Yu Wayborn Quality & Technology Services 306, Xincheng International Main Building, No.535 Qingshuiqiao Road, Ningbo High-tech Zone Email: wayborn@wayb.org

___________________________

1 The FDA logo is for official use by FDA and not for private use on labeling of FDA-regulated products. See FDA Logo Policy (available at: https://www.fda.gov/about-fda/website-policies/fda-logo-policy)

Citations and trends

Each 21 CFR section, ISO 13485 clause and issue type in this letter, how often it appears across all letters, and its trend by the year FDA issued the letters. 2026 runs to Nov 3, 2026, compared with the same dates last year. Select a row or a bar to see those letters in Letters. As cited in this historical letter, not a statement of current requirements.

Regulations

Issue types

Record details

Issuing center
Center for Devices and Radiological Health
Issuing office
Center for Devices and Radiological Health
Location
Portland, OR, United States
Letter posted date
Oct 5, 2021
Letter issue date
Aug 9, 2021
Addressed to
Not recorded
Inspection dates
Not recorded
Response window
15 business days after receipt of this letter
Read the source clause
Please notify this office in writing within fifteen (15) business days from the date you receive this letter of the specific steps your firm has taken to address the noted violations, as well as an explanation of how your firm plans to prevent these violations, or similar violations, from occurring again.
Record length
1,898 words · 0 recorded redactions
Published status
No published close-out
Original letter
View on FDA.gov (opens in a new tab)
Dataset last checked
Nov 11, 2026 · How this is built

A response window is not a calculated due date. Source excerpts are selected passages. Finding interpretations and categories are model-assisted. Verify the original letter before relying on a finding.

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