Skechers Men FLEX ADVANTAGE 4.0 – MATTUS 232239 BBKStay active in flexible lightweight comfort with Skechers Flex Advantage 4. 0 Mattus. This sporty slip on features an engineered mesh upper with a cushioned Skechers Air Cooled Memory Foam insole. Product Highlights AIR COOLED MEMORY FOAM MACHINE WASHABLE VEGAN Key Features Skechers Air Cooled Memory Foam cushioned comfort insole Crafted with 100% vegan materials Design Details Engineered mesh upper with a slip on style Flex Lite shock absorbing