Crux Reservoir: 50oz capacity delivers 20 percent more water per sip with ergonomic handle for quick refills Minimalist Design: Lightweight and compact, ideal for short rides and quick adventures Ventilated Comfort: Breathable air mesh back panel and mesh harness ensure a cool, comfortable fit Secure Storage: Zippered pocket holds keys, tools, or small essentials safely Built to Last: Covered by CamelBak’s Got Your Bak Lifetime Guarantee for peace of mind