BECAUSE YOUR GYM NEVER CLOSES. TRACTION: 16 replaceable, ultra-durable push through carbide studs strategically located to grip the road or the trail. FIT: STRETCH FIT: Durable, proprietary, adjustable strap for a secure, custom fit-from running shoes to outdoor boots. PACKABLE: Stretch rubber folds and compresses for extreme packability. COLOR: Grey/Green SPECS: 4.5 oz. per pair PACKAGING: Peggable Cardboard Package. REPLACEABLE PUSH-THROUGH CARBIDE STUDS: Run a few snowy marathons then replace your studs with a fresh batch. SIZES: One size fits most (Women's 6 - Men's 14)