Oboz O Fit Insole Plus Thermal Insole (Women)Designed to put your foot in a neutral position. High density EVA sculpted arch for superior support. High density EVA deep heel cup maximizes stability and support. Poron Comfort pods provide superior shock absorption and rebound. Medium density EVA throughout for unmatched underfoot support without loss of cushioning. Moisture wicking comfort top layer with foam underlay. Reflective mylar base layer reduces heat loss. Trim to fit