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