The Salomon Genesis 2 Spike GTX takes the Genesis 2 trail platform and adds carbide spikes for grip on ice and hard-packed snow, with a GORE-TEX membrane to keep feet dry through slush and wet snow. A separate model from the standard Genesis 2 GTX - built specifically for winter running. Traction: carbide spikes for ice and packed snow Waterproofing: GORE-TEX membrane Midsole: optiFOAM with activeCHASSIS for stability Upper: lightweight, abrasion-resistant Matryx textile / synthetic Lacing: quickLACE one-pull system Drop: 8 mm Colorway: BLACK / BLACK Sizes: US men&';s 7-14, half sizes included.