3/8″ thick, so you need to wear 1 size larger Force Fin to fit Comfort Insteps in the fin foot pocket.
Comfort Insteps are fluffy fleece lined. They fit inside Force Fin foot pockets to cushion your foot from abrasion. They form to the unique contours of your foot to eliminate any pressure points. Comfort Insteps double the size range your Force Fins can fit, substitute for a low profile sole bootie and wear your Force Fins barefoot.