blog/
122 pages · Updated July 29, 2026
Pages
- Best HSA Strategies for Spending (& Saving) Your Money
- HSA/FSA Case Studies
- What To Do If You Overcontribute to an HSA + Fixing It
- Flex - How Airdog improved their conversion rate by 20% integrating Flex
- Flex - How AMMD by Amy Myers MD increased AOV by 2.5X with Flex
- How Forme Helps Customers Improve Posture & Prevent Pain With Flex
- Flex - How Chilipad by Sleepme Improved Click Through Rates by 8.3%
- How Kindred Bravely Helps Moms Save on Nursing & Maternity Essentials with Flex
- The Pause Life Case Study: HSA/FSA Subscriptions with Flex
- When & Where You Can Use Your HSA/FSA Funds For Pilates
- How to Buy Sunscreen with an HSA/FSA Plan in 2025
- Flex - Tips for a Successful Dry January
- When Are Supplements HSA/FSA Eligible + Where To Buy
- Flex - How to Tell if Your Heart Is Healthy With Help From Your HSA/FSA
- Are Vitamins FSA/HSA Eligible & What You Can Buy
- Flex - IRS Requirements for HSA and FSA Purchases
- Complete List of 220+ FSA Eligible Items & Expenses
- Are Orthopedic Shoes & Inserts HSA & FSA Eligible?
- Are Pads HSA/FSA Eligible & Where Can You Buy Them?
- Do HSA Funds Expire? (HSA Rollover Rules Explained)
- Are Running Shoes HSA or FSA Eligible & Where to Buy Them
- Flex - Use Your HSA/FSA for Posture Correctors
- Flex - Are Heating Pads and Other Menopause Treatments HSA/FSA Eligible?
- Flex - Buying Incontinence Products with HSA/FSA
- Flex - Can You Use HSA for Dental Care? In-Depth Guide
- Flex - How to Buy a Molekule Air Purifier With Your FSA or HSA
- How to Get a Letter of Medical Necessity for Gym Memberships
- Top HSA/FSA Approved Exercise Equipment & Where to Buy
- Flex - Are Electrolytes and ORS HSA/FSA Eligible?
- Is Skincare HSA/FSA eligible?
- Flex - Can You Use HSA/FSA For Massage
- Flex - Can You Use HSA/FSA to Pay for Glasses?
- Rules for Claiming HSA Expenses from Previous Years
- Flex - Are Body Composition Scales HSA/FSA Eligible?
- Which Skincare Products Are HSA/FSA Eligible?
- Flex - How Does HSA and FSA Reimbursement Work?
- 3 Easiest Ways To Get a Letter of Medical Necessity Online
- When & How To Pay for Yoga Classes With Your HSA/FSA
- Navigating Telehealth Compliance: Letters of Medical Necessity for HSA/FSA
- How to Accept HSA/FSA Payments as a Merchant with Stripe
- Are Probiotics HSA & FSA Eligible? (& How to Buy Them)
- Where To Get HSA/FSA Eligible Red Light Therapy
- Is Semaglutide HSA/FSA Eligible? (+ How to Buy Online)
- Best HSA/FSA Approved Shoes & When They Qualify
- Are Compression Socks HSA/FSA Eligible & Where To Buy Them
- How To Buy HSA/FSA Eligible Tampons & When You Can
- Flex - Menstrual Pain Relief: How Your HSA/FSA Can Help
- 8 Best Super Greens Powders (That Are HSA/FSA Eligible)
- Flex - Are Blue Light Blocking Glasses HSA or FSA Eligible?
- Flex - Are Saunas HSA or FSA Eligible?
- Flex - Are Hearing Aids HSA/FSA Eligible?
- Engineering
- Flex - Are Feminine Hygiene Products HSA/FSA Eligible?
- Flex - Does Pair Eyewear Take HSA or FSA?
- How To Accept HSA/FSA Payments To Grow a Shopify Store
- Flex - Can You Buy Sunglasses With Your HSA/FSA
- Flex - Is a Theragun Massage Gun HSA/FSA Eligible?
- Flex - Can You Use HSA/FSA For Weight Loss Programs?
- Critical HSA Taxes & Deductions Questions Answered
- The Flex AI Investigation Agent for HSA/FSA Payments
- HSA/FSA Compliance
- From Capitol Hill to Your Wallet: Advocacy for Your Benefit
- Flex - Are Fitness Programs & Classes HSA/FSA Eligible?
- Flex - Open-Enrollment Period: Planning Your HSA and FSA for 2025
- How & When You Can Use HSA/FSA for a Gym Membership
- A Guide To HSA and Medicare Contributions & Eligibility
- Flex - Is Protein Powder HSA and FSA Eligible?
- Using Your HSA/FSA for Fertility Treatments & Devices
- Flex - Are Fitness Apps HSA/FSA Eligible?
- Flex - Is WHOOP HSA/FSA Eligible?
- Your 2026 Open Enrollment Cheat Sheet: 7 Terms You Actually Need to Know
- HSA Reimbursement Rules, Timelines, & How It Works
- How Nanobébé Helps Parents Easily Use Their HSA/FSA Funds with Flex
- Securing Flex Checkout Order Confirmations with Webhooks
- Flex - Are Diapers FSA Eligible
- HSA Withdrawal Rules, Taxes, and How To Do It Properly
- Where & How To Buy HSA/FSA Eligible Period Underwear
- How & Where To Buy HSA/FSA Approved Shoes for Women
- Flex - HSA/FSA Eligible Baby Items: An In-Depth Guide
- Post Not Found
- Medicare Flex Card Eligibility, Benefits, & Scams Guide
- 10 Surprising HSA/FSA Eligible Items You Can Buy Online
- Flex - How Trainwell Increased Trial Conversions by 20% by Accepting HSA/FSA
- Consumer Resources
- 9 Best Red Light Therapy Devices (+ HSA/FSA Eligible)
- Flex - Is ARMRA Colostrum HSA or FSA Eligible?
- Flex - Can you reimburse sales tax on HSA and FSA-eligible items?
- How To Invest HSA Funds To Strategically Grow Over Time
- Flex - Can You Use Your HSA or FSA For a Personal Trainer?
- HSA Contribution Deadline: When It Is & How It Works
- HSA Family Coverage Rules: Spouses, Friends, Dependents
- 2027 HSA Contribution Limits: $4,500 Self-Only, $9,000 Family
- How To Make the Most of HSA Catch-Up Contributions
- IRS HSA/FSA Eligibility Explained by a Head of Compliance
- What makes a product or service an IRS qualified FSA/HSA expense?
- Is Melatonin HSA/FSA Eligible? (& Where to Buy It)
- Can You Use HSA or FSA for Endurance Races?
- Is Toothpaste HSA or FSA Eligible? (& How to Buy It)
- HSA/FSA Eligibility for Mattresses: What Mattress Brands Need to Know
- MCP Use Cases: Building a Custom MCP Server for Merchants
- Shop Pay “Pay Another Way”: A Faster Path to HSA/FSA Checkout on Shopify
- Flex MCP: Connect Claude, Cursor, and More Directly to Your Flex Account
- 10 Best Period Underwear (That Are HSA/FSA Eligible)
- Flex - What Can You Use Your HSA and FSA For?
- How Flex Makes HSA/FSA Subscriptions Seamless and Compliant
- Best HSA FSA Payment Solutions for Yoga Studios in 2026
- Flex - Metabolic Testing at Home: Better Health Insights Covered by Your HSA
- Shopify HSA/FSA App: Auto-Sync Eligibility & Badges | Flex
- Flex + SHOPLINE: Enabling HSA/FSA Payments for In-App Subscriptions
- New and Improved Dashboard Overview
- Flex and Silver Partner to Streamline Letters of Medical Necessity for TPAs and Consumers
- Merchant Resources
- How To Buy An Oura Ring with HSA/FSA Eligible Funds
- Flex - What Are HSAs and FSAs? A Comprehensive Guide
- Announcements
- Flex - Benefits of Accepting HSA/FSA Payments
- The Letter of Medical Necessity Problem | Flex
- Flex - What Is A Letter Of Medical Necessity?
- Flex - Key HSA FSA Trends for Shopify Store Growth in 2025
- Flex Raises $15M to Unlock $150B in Unused HSA/FSA Funds
- Flex + RevenueCat: Enabling HSA/FSA Payments for In-App Subscriptions
- Flex - How an Orthopedic Shoe Company Boosted AOV by 20% with Flex