NIGHT SPLINT provides gentle stretching of the plantar fascia and Achilles tendon as you sleep to help eliminate heel pain. Removable gel pack delivers targeted cold therapy. Has comfort-foam padding, adjustable flexion strap and hook-and-loop tabs. S/M fits women’s shoe sizes 5 to 9-1/2; men’s sizes 5 to 10. L/XL fits women’s and men’s sizes 10 and up.