USWE Race 2. 0 Hydration Pack The ultimate pack for the fastest races On races and rides when a couple of water bottles on your bike won't cut it for hydration, the USWE Race 2. 0 Hydration Pack is your ultimate race companion. This ultra-lightweight hydration pack clocks in at only 230 grams, and has been shown in wind tunnel testing to provide an aerodynamic advantage over not wearing a pack at all. A lightweight and aerodynamic design is great, but the function of the USWE Race 2. 0 Hydration Pack sets it apart from the competition, with a highly breathable 3D mesh to keep riders cool, and the USWE-patented No Dancing Monkey(TM) suspension harness to keep the pack stable and comfortable. Race farther and faster than ever before with the USWE Race 2. 0 Hydration Pack. Features Race-ready design with a lightweight construction, aerodynamic advantages, and breathable, stable comfort2-liter Elite hydration bladder gives riders ample hydration capacity for the biggest ultras Aerodynamically optimized with wind tunnel testing showing the Race 2. 0 pack is more efficient than no pack at all No Dancing Monkey(TM) 1. 0 Pro harness system is USWE's patented 4-point performance suspension harness, keeping the pack secure and comfortable Most breathable USWE pack ever using a 3D mesh, and a breathable lightweight backplate Environmentally friendly construction with a PFAS-free DWR-treated polyester fabric that's crafted using recycled ocean plastics Specifications Weight230 grams Total Volume2-liter Hydration Reservoir Capacity2-liter | Uswe | Race 2. 0 Hydration Pack Black | Polyester