The name says it all: the CamelBak Classic Hydration Pack is the quintessential bike hydration pack, now updated with a Crux reservoir for a faster flow of water. Features: The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks Breathable air mesh back panel for a lightweight, comfortable fit Reflective accents for visibility in low-light environments Secure zippered pocket for essentials Lightweight, ventilated mesh harness Specs: Collection: Bike Activity: Cycling User: Unisex Hydration Capacity: 2.5L/85 fl oz Hydration Type: CRUX Reservoir with Standard Exit Port BPA/BPS/BPF FreeQuick Link Disconnect: No Gear Capacity: 0.5L/30 cu in Pack Weigh