Introducing the Tubes Slip-on, the perfect sneaker for running out the door. Built around our patented Tubes system, the Slip-on provides unmatched cushioning and flexibility through individually tuned tube structures that collapse and rebound as you walk. Smaller, more rigid tubes on the inside area of the heel ensures extra medial support to reduce pronation. A lightweight engineered mesh upper gives a comfy sock-like fit that's easy to slip on and off with no laces to worry about.