Flux Lab Pte. Ltd. d/b/a The Fluxion
FDA issued a warning letter to Flux Lab Pte. Ltd. d/b/a The Fluxion (Singapore) on Dec 16, 2025. Subject: Failure to Register and List, Misbranded.
From the letter: “Chest Binders: In contrast, chest binders are used primarily by transgender individuals and those with gender dysphoria to compress and flatten the chest.”
FDA published a close-out letter on Apr 7, 2026. 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
- 4 findings · 2 issue types
- Cited
- No CFR or ISO section
- Response due
- 15 business days after receipt of this letter
- FDA asks for
- 6 actions
- Named as possible actions
- Seizure, injunction
- Issued by
- Center for Devices and Radiological Health
- Published status
- Close-out Apr 7, 2026
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's website marketed breast binders for treating gender dysphoria, making them devices under the FD&C Act.
Chest Binders: In contrast, chest binders are used primarily by transgender individuals and those with gender dysphoria to compress and flatten the chest.
02Labeling, claims & marketingThe firm's website claimed the product alleviates gender dysphoria, supporting device classification.
Binding can be a significant step in affirming one’s gender and can help alleviate gender dysphoria.
03Labeling, claims & marketingThe firm's website claimed the product alleviates chest dysphoria and promotes well-being, supporting device classification.
Freedom from Chest Dysphoria: Those who seek a secure, snug fit without the discomfort of breast pressure to alleviate chest dysphoria and promote overall well-being
04Registration, listing & premarketThe firm failed to register as a device manufacturer and list its devices for fiscal year 2026.
Our records indicate that you have not registered or listed these devices for fiscal year 2026.
What FDA requested
- Provide specific steps taken to address the noted violations
- Explain how the firm plans to prevent these violations or similar violations from occurring again
- Include documentation of corrections and/or corrective action addressing systemic problems
- Provide a timetable for implementation if corrections will occur over time
- State reason for delay and time within which activities will be completed if not completed within 15 business days
- Provide translation of documentation not in English
FDA Warning Letter
18 paragraphs · 1 sectionText as published on FDA.gov, retrieved Nov 1, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)
1Letter text
13 paragraphs
The United States Food and Drug Administration (FDA) has reviewed Flux Lab Pte. Ltd. d/b/a The Fluxion’s (“your firm”) website (thefluxion.com) and observed that your website offers various breast binders for sale. Under section 201(h) of the Federal Food, Drug, and Cosmetic Act (the Act), 21 U.S.C. § 321(h), 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.
Our review of your firm’s website revealed statements that these breast binders (example trade names: “The Fluxion Tank Chest Binder – Black”, “The Fluxion Regular Chest Binder-Half-Black”, “The Fluxion GYM Chest Binder – Racerback Taupe”) are intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease, or intended to affect the structure or any function of the body, including:
Per your firm’s website: “Chest Binders: In contrast, chest binders are used primarily by transgender individuals and those with gender dysphoria to compress and flatten the chest.”
Per your firm’s website: “Binding can be a significant step in affirming one’s gender and can help alleviate gender dysphoria.”
Per your firm’s website: “Freedom from Chest Dysphoria: Those who seek a secure, snug fit without the discomfort of breast pressure to alleviate chest dysphoria and promote overall well-being”
Our review also revealed statements that you manufacture these devices within the meaning of section 510 of the Act (21 U.S.C. § 360) (e.g., “That’s why we incorporate our expertise in developing compression products from the sports and medical industries into our product development process.”). Under section 510 of the Act (21 U.S.C. § 360), manufacturers of medical devices are required to annually register with the FDA. In September 2007, section 510 of the Act was amended by the Food and Drug Administration Amendments Act of 2007 (Pub. L. 110-85) to require domestic and foreign device establishments to submit their annual establishment registration and device listing information to FDA by electronic means [section 510(p) of the Act (21 U.S.C. § 360(p))] during the period beginning October 1st and ending December 31st of each year. Our records indicate that you have not registered or listed these devices for fiscal year 2026.
Therefore the devices are misbranded within the meaning of section 502(o) of the Act (21 U.S.C. § 352(0)), in that they were manufactured, prepared, propagated, compounded, or processed in an establishment not duly registered under section 510 of the Act (21 U.S.C. § 360) and were not included in a list required by section 510(j) of the Act (21 U.S.C. § 360(j)).
Your firm should take prompt action to address any violations identified in this letter. Failure to adequately address this matter may result in regulatory action being initiated by the FDA without further notice. These actions include, but are not limited to, seizure and injunction.
Other federal agencies may take your compliance with the FD&C Act and its implementing regulations into account when considering the award of federal contracts.
Please notify this office in writing within fifteen business days from the date you receive this letter of the specific steps your firm has taken to address the noted violations, including an explanation of how your firm plans to prevent these violations, or similar violations, from occurring again. Include documentation of the corrections and/or corrective action (which must address systemic problems) that your firm has taken. If your firm’s planned corrections and/or corrective actions will occur over time, please include a timetable for implementation of those activities. If corrections and/or corrective actions cannot be completed within fifteen business days, state the reason for the delay and the time within which these activities will be completed. Please provide a translation of documentation not in English to facilitate our review. We will notify you regarding the adequacy of your firm’s response(s) and the need to re-inspect your firm’s facility to verify that the appropriate corrections and/or corrective actions have been made. If you believe that your products are not in violation of the FD&C Act, include your reasoning and any supporting information for our consideration as part of your response.
Your firm’s response should be sent via email to CDRHEnforcement@fda.hhs.gov. Please include in the subject line, “CMS 720847” when replying.
Finally, you should know that this letter is not intended to be an all-inclusive list of the violations at your firm’s facility. It is your firm’s responsibility to ensure compliance with applicable laws and regulations administered by FDA.
Your firm should investigate and determine the causes of any violations and take prompt actions to address any violations and bring the products into compliance.
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
- Singapore
- Letter posted date
- Dec 18, 2025
- Letter issue date
- Dec 16, 2025
- Addressed to
- Director
- 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 business days from the date you receive this letter of the specific steps your firm has taken to address the noted violations, including an explanation of how your firm plans to prevent these violations, or similar violations, from occurring again.
- Record length
- 824 words · 0 recorded redactions
- Published status
- Close-out published Apr 7, 2026
- FDA reference
- 720847
- 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.