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…”
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 sectionText 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)
Re: “KN95 Face Mask”
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.
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.
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.