Design: Soft and slightly stretchy mesh helps keep you comfortably going for miles Thin speed laces have a knit-in texture that helps keep knots more secure than traditional laces In-Shoe Comfort: Full-length ZoomX foam optimizes resiliency and energy return while staying lightweight Durability & Traction: Full-length Waffle outsole pattern grips various surfaces and terrain Lugs around the outsole help enhance grip in multiple conditions