Tread Labs introduces Stride orthotic insoles. The two-part system features a molded polypropylene arch support and a replaceable topcover, which attaches to the arch support with low-profile Velcro to make replacement or modification fast and easy. Arch supports are molded polypropylene and have a 12-mm heel cup. They are semiflexible for firm but dynamic support. The antimicrobial topcovers feature silver ions and 4-mm open cell polyurethane foam, which resists compression set and provides long-term resiliency. All Tread Labs insoles for men and women come in 21 sizes and four arch heights.