Adapt Trainer Product Description

The Ultimate Barefoot Athleisure Shoe

The Flux Adapt is unlike anything you've ever worn before, and built to be as adaptable as you.

With a groundbreaking, responsive sole technology concealed in a classic look, it's the perfect balance of style and tech to support you in every activity throughout your day. 

 Gym tested. Date approved.

  • Zero-Drop
  • Performance Width Forefoot Shape
  • Ultra Flexible
  • Breathable AdaptKnit™ Upper
  • AdaptSol™ Footbed
  • 10mm Stack Height
  • Weight: 9.8oz (Size 10m)

Flux Footwear is now FSA & HSA Eligible!

At Flux, we believe that access to natural movement footwear should be simple which is why we've partnered with Truemed. Truemed allows you to use your Flexible Spending Account (FSA) or your Health Savings Account (HSA) towards your footwear purchase.


In order to get qualified for your footwear purchase, you can either fill out the intake form prior to purchase or during purchase.

If you'd like to fill out the intake form prior to purchase, please follow these steps:

  • Click this link to fill out the short Truemed intake form - no live doctor consultation needed. If approved, Truemed will send you a Letter of Medical Necessity within 24 hours.
  • Purchase your Flux and remember to keep your receipt in your order confirmation email to be eligible for reimbursement.
  • Once you get your Letter of Medical Necessity, submit it along with the receipt in your order confirmation email to your HSA/FSA provider for reimbursement.

If you'd like to get qualified during checkout, please do the following:

  • Add your Flux to cart
  • Check out as a guest to ensure the TrueMed payment option appears (do not use Shop Pay or Apple Pay)
  • Fill out your details and shipping information
  • On the payment screen, select Truemed as the payment method and enter your FSA/HSA debit card information or check out with a normal credit card.
  • Complete the intake form to assess your eligibility.
  • If qualified, you will receive your Letter of Medical Necessity from TrueMed within 24 hours.

The intake form is only a few questions. No live consultation with a doctor is required. If eligible, approval is instant. Truemed will then provide a Letter of Medical Necessity via email within 24 hours.

Each Letter of Medical Necessity can cover multiple footwear products from Flux.

Each Letter is valid for 12 months before it needs to be renewed.

Truemed makes your recent purchase and future purchases eligible for reimbursement through your FSA/HSA. Eligibility of reimbursement claims for previous orders is subject to requirements set forth by your FSA/HSA provider so we recommend contacting them for inquires related to reimbursement for previous orders.

Most FSA and HSA administrators approve these expenses within days of when you submit. The exact timing will depend on your specific administrator.

Yes! You can submit your purchase for partial reimbursement with your provider. You will make the purchase at the listed price on our store and submit your Letter of Medical and receipt to your FSA/HSA administrator. Your administrator can then reimburse you with whatever remaining blance you have in your account if it less than the purchase price.

Only footwear purchases will be FSA/HSA eligible. Accessories are not considered eligible.