Tough-1 Vented Sport Boot 4-Pack Tough-1 Sport Boots are designed to fit snug against the leg to help keep out water mud and dust. They feature a one-piece user-friendly design to help provide extra support; contour design supports fetlock area. Tough-1 Vented Sport Boots have a double layer of air-flow (vented) neoprene and a single tab with quick-grip closure for easy on/off - tab extension is easy to grip when removing and locks large tab in place. Hand washing is recommended. Includes front and rear pairs (set of 4). Note: Sizing may be indicated by letter on the sport boot. An example would be L for large size.