An HSA (Health Savings Account) and FSA (Flexible Spending Account) are tax-advantaged accounts used to pay for qualified medical expenses. HSAs offer funds that roll over each year, while FSAs usually must be used within the plan year.

Choose “Flex | Pay with HSA/FSA” during checkout and follow the prompts. You’ll complete a quick telehealth consult and then pay with your HSA or FSA debit card.

If the payment option doesn’t show, there may not be any eligible products in your cart. If you believe this is incorrect, please contact us

Try checking out in an incognito/private window or clear your browser cache to disable Shop Pay auto-loading.

Most commonly, this is due to insufficient funds or incorrect card info. Check your balance or re-enter your card details to try again.

Yes! Complete checkout using a regular card, and Flex will email you an itemized receipt and LOMN that you can submit to your provider.

A document from a healthcare provider that explains why your Aqua Training Bag is medically necessary — often required for tax-advantaged purchases. Flex will issue this after your quick consult.

Flex is our payment partner that enables you to use your HSA or FSA benefits securely and easily. Think of it like Klarna or Affirm — but for health-based payments.