CamelBak: The ultimate minimalist bike pack, with a women’s-specific fit. Grab this light and simple pack when you only need the bare essentials for your 2-hour adventure. The new Crux reservoir is designed to make refilling your water supply even easier, and the simple on/off valve lets you seal things shut when you’re not drinking.PACK ONLY WEIGHT:150g / 0 lb 5 ozTORSO FIT RANGE:38-53cm / 15-21 in FABRIC: 200D Polyester Plain WeaveFEATURES: • 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.• Women's-specific design features a shorter back panel and an S-curved harness for a closer fit.• Lightweight, ventilated mesh harness.• External reservoir fill lets you refill your reservoir without removing it from the pack.