ARCH BAND: supports the ankle to promote a secure stance LAMBERTZ PROTECTOR: even distribution of pressure and padding on the Achilles tendon CROSS ventilation: mesh fabric for good instep ventilation; spacer pads create gap between foot and shoe padded ankle, instep and toe BIOSPLIT footbed: padding and ventilation zones relieve pressure on sole of foot at high stress areas blend of polyamide, acrylic, polypropylene and elastane #1,263,916 in Clothing, Shoes & Jewelry ( ) #918 in #3,887 in