Rubber outsole pads lightweight rubber provides a durable grip on a variety of surfaces Midsole dual density methyl vinyl acetate provides lightweight shock absorption to help reduce foot and leg fatigue Footbed sponge ethyl vinyl acetate conforms to the shape of the foot for a personalized fit Lining dewax anti microbial linings help reduce foot odor and wick moisture to help keep the foot dry Comfort system designed to provide lightweight shock absorption.