Devices

Captain's Cloth LLC

FDA issued a warning letter to Captain's Cloth LLC (Laguna Niguel, CA, United States) on Jul 2, 2021. Subject: Investigational Device Exemptions (IDE), Premarket Approval Application (PMA).

From the letter: “Accordingly, this product is 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…”

Laguna Niguel, CA, United StatesIssued Jul 2, 2021Posted Aug 10, 2021Close-out Oct 7, 2021

FDA published a close-out letter on Oct 7, 2021. The findings below are from the original warning letter.

At a glance

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

Violations
3 findings · 2 issue types
Cited
No CFR or ISO section
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
Close-out Oct 7, 2021

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.

01Registration, listing & premarketThe KN95 Face Mask is adulterated because it lacks an approved PMA or IDE.
Accordingly, this product is 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).
02Registration, listing & premarketThe KN95 Face Mask is misbranded because the firm did not submit a 510(k) notification.
This product is 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).
03Labeling, claims & marketingThe KN95 Face Mask is misbranded because its labeling is false or misleading, including claims of active FDA status and display of the FDA logo.
In addition, the KN95 Face Mask is also misbranded under section 502(a) of the Act, 21 U.S.C. § 352(a), because its labeling is false or misleading. Specifically, your websites contain false or misleading representations, including but not limited to: - Representations that the KN95 Face Masks “have an active status with the FDA…” [https://captainscloth.com/products/kn95-face-masks-5-pack] - Unauthorized display of what appears to be FDA’s logo*1* on the front and back of the product’s labeling [https://captainscloth.com/products/kn95-face-masks-5-pack]

What FDA requested

  • Notify FDA in writing within fifteen business days of the specific steps taken to address the noted violations
  • Provide an explanation of how the firm plans to prevent these violations or similar violations from occurring again
  • Include documentation of any actions taken
  • If planned actions will occur over time, include a timetable for implementation

FDA Warning Letter

26 paragraphs · 1 section

Text as published on FDA.gov, retrieved Oct 19, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)

Sent toDATE: July 2, 2021
Re: “KN95 Face Mask”
AddressedDear Brian Eckert

1Letter text

14 paragraphs

This is to advise you that the United States Food and Drug Administration (FDA) reviewed your website at the Internet address https://captainscloth.com/ on June 10, 2021, where you offer the “KN95 Face Mask” for sale in the United States. We also reviewed your social media page at https://www.facebook.com/Captains-Cloth-140013110203384/ where you direct consumers to your website to purchase the KN95 Face Mask. 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 KN95 face masks 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, including but not limited to:

Statements alongside an image of the KN95 Face Masks that they “filter out 95% of particles” and that your firm is “working primarily with medical distribution companies … to support those on the front lines” [https://captainscloth.com/products/kn95-face-masks-5-pack]

Statements made on the KN95 Face Mask packaging that “This product can filter air particulates, dust, smoke, mist, microorganisms, block droplets, body fluids, secretions…” and “Prevent Virus” [https://captainscloth.com/products/kn95-face-masks-5-pack]

The KN95 Face Mask, which your website represents is manufactured by “Lianyungang Manai Protective Equipment Co. Ltd.” (Lianyungang) is offered for sale in the United States without marketing approval, clearance, or authorization from the FDA. Accordingly, this product is 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). This product is 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, the KN95 Face Mask is also misbranded under section 502(a) of the Act, 21 U.S.C. § 352(a), because its labeling is false or misleading. Specifically, your websites contain false or misleading representations, including but not limited to:

Representations that the KN95 Face Masks “have an active status with the FDA…” [https://captainscloth.com/products/kn95-face-masks-5-pack]

Unauthorized display of what appears to be FDA’s logo1 on the front and back of the product’s labeling [https://captainscloth.com/products/kn95-face-masks-5-pack]

Display of the FDA logo on packaging and near images of and information about the respective products, combined with statements about having active status with the FDA, is misleading because such information implies FDA approval, clearance, authorization, certification, endorsement, or other evaluation of the products and/or establishments. 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.

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 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# 611829 or CTS Number CPT2001007 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: Youbiao Wei Lianyungang Manai Protective Equipment Co., Ltd. Jinshan Town Industrial Park, Ganyu District Lianyangang, Jiangsu CN 222002

US Agent: Hong 38 South 18th Avenue, Suite A Brighton, CO 80601 Email: abmedservice@outlook.com

Lianyungang Manai Protective Equipment Co., Ltd. No. 6 Building, 1-8 North Street, Sanyuanli Yaochi, Yuexiu District Guangzhou, Guangdong CN 510030

Official Correspondent: Shuo Wang Lianyungang Manai Protective Equipment Co., Ltd. Kuangquan Street Yaochi North Street Community Guangzhou, Guangdong CN 510030

___________________________________

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.

This letter cites no 21 CFR section or ISO 13485 clause.

Issue types

Record details

Issuing center
Center for Devices and Radiological Health
Issuing office
Center for Devices and Radiological Health
Location
Laguna Niguel, CA, United States
Letter posted date
Aug 10, 2021
Letter issue date
Jul 2, 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
988 words · 0 recorded redactions
Published status
Close-out published Oct 7, 2021
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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