Customized fit. Passed strict independent slip resistance testing with its superior surface traction, designed to perform on wet or dry surfaces.bio DEWIXTM Anti — Microbial Footbed Insert Topcover with NZYMTM for Odor Control and Moisture Management Dual Density Footbed with Memory Foam for Long Lasting Comfort Extra Toe & Heel Underlays for Additional Protection Oil & Gas Resistant Outsole