# Flex HSA/FSA Marketplace > Flex is a health savings account (HSA) and flexible spending account (FSA) payment marketplace. > Browse HSA/FSA-eligible products and services from trusted health and wellness brands. ## Key Pages - /: Homepage — browse featured brands and products - /search: Search HSA/FSA eligible products and brands - /brand/category/all: Browse all partner brands - /brand/category/{slug}: Browse brands by category (e.g. fitness, supplements, mental-health) - /brand/{slug}: Individual brand page with products and HSA/FSA usage steps - /product/{slug}: Individual product detail with eligibility info ## About Flex Flex enables consumers to use their HSA/FSA pre-tax dollars on eligible health and wellness products. Some products are directly eligible (IIAS-verified), while others require a Letter of Medical Necessity (LMN) obtained through a brief telehealth consultation. ## Contact - Email: support@withflex.com - Website: https://www.withflex.com