With a race inspired 4-point harness, the MSR Low-Profile Race Hydration Pack is your all-in-one race ready pack. Lightweight construction paired with durable materials makes for the perfect balance of performance and quality. The MSR Low-Profile Race Hydration Pack comes with a 70 oz. (2 Liter) hydration reservoir.Quality, compact hydration pack with the racer in mind.4-point harness to keep the pack secure to your body.Fully adjustable to fit most riders.Top-of-the-line 70 oz. (2 Liter) Hydrapak™ brand hydration reservoir.High-Flow Blaster ™ bite valve self-seals after each sip and features a twist on/off bar to prevent leaks when not in use.Padded air-mesh back panels allow air flow.Convenient magnetic hose clip securely holds the hose in place.Main compartment features a pocket to securely hold the reservoir and another pocket for misc. items.External 5.25" wide x 8" tall zippered pocket with an internal key ring clip.