Benefits These massaging insoles break down sweat into odor free water and C02 thanks to their heir 100% natural self-activating enzymes Provides a superb, breathable Massaging Wave foam of comfort and promotes wellness Use Shock absorbing comfort foam is 100% recycled and sustainably sourced. Plant based, biodegradable polymer additive and hydrophilic molecules combine with fibers to dissipate water cool, soft and fast drying Instructions Insert in any types of shoes Change once over used