- Nike - Nike ACG Mountain Fly 2 Low GORE-TEX - Lightweight synthetic upper with GORE-TEX - Lace-up closure - Toggle laces - Crag-like traction on sole inspired by mountain bike tires - Sticky rubber outsole for durable traction - Color: Dark Smoke Grey/Black/Anthracite/Black - Material: Synthetic, Rubber - See more Sneakers and Shoes