Designed with superior-quality and durable materials, our Crux Hundred-ounce water reservoir provides the hydration you need while you're navigating the outdoors. The 3-Liter Crux reservoir makes it easier to load and refill. It produces 20% more water per sip, which helps you stay hydrated while enjoying an outdoor afternoon. The Lumbar reservoirs are specifically designed for all CamelBak “LR” hydration packs. Our Lumbar reservoirs are designed to shift water weight to the lower back, which translates to better stability in the saddle and on the trail. The Crux 3-Liter water reservoir is made from leak-proof materials and features an on/off switch and a tightened cap that ensures it won't leak in your bag. The plastic does not contain BPA-, BPS-, and BPF and is durable and long lasting. The ergonomic design of the Crux allows it to fit easily in your bag. Finally, the big bite valve allows you to intake more water than older models and will self-seal after each sip, eliminating the risk of drips. Our Got Your Bak Lifetime Guarantee covers all reservoirs, backpacks, bottles, and accessories from manufacturing defects in materials and workmanship for the lifetime of the product. The CamelBak Crux 3-Liter hydration reservoir weighs 8 ounces and measures 10.5 x 11 x 3 inches.