Features Enter your model number to make sure this fits. Breathable, comfortable mid- layer vest with integrated compression compartment to keep Omega reservoir stable while riding, skiing or on the chair Chest pocket makes storage of bite valve easy Insulated tube cover and close to core positioning enhances freeze resistance Soft Shell vest can be worn with or with without the integrated reservoir liner Vest weight (sz med) with filled reservoir is 5.69 lbs Description Product Description Product Description The first of it's kind hydration system that's actully integrated into a mid - layer vest. Close to body contact keeps water from freezing. Low profile design frees you up on the lift. Small = chest size 35 - 39"; Medium = chest size 39 - 41"; Large = chest size 41 - 44"; XL = chest size 44 - 47"; XXL = chest size 47 - 50" Amazon.com Hydration meets fashion, with high-performance results. Keeping thirst at bay on the slopes just got a little easier--no trip to the lodge for over-priced bottled water required. CamelBak’s new ShredBak Hyrdation Pack is a first in the category--a hydration system seamlessly integrated into an attractive mid-layer fleece vest. A form-fitting mesh inner layer keeps the Omega water reservoir close enough to your body to prevent freezing, while the fleece outer layer keeps you toasty warm on the lift and allows sufficient range of motion while cutting fresh tracks on the mountain. The vest’s chest pocket allows easy access to the bite valve for quick drinks, and the insulated water tube cover keeps the liquid flowing. The soft shell vest can also be worn separately when relaxing at the end of the day. About CamelBak CamelBak is the originator and world leader in hands-free hydration systems. The first CamelBak products proved to be very popular among mountain bikers and motocross riders, because it allowed them to drink without taking their hands off of the handlebars in technical terrain. The product began to cross over into other sports when scientific studies showed athletes drank more fluids and performed better when they wore a CamelBak. Since then, athletes from an ever-growing list of sports and activities use CamelBak hydration systems for their convenience and performance benefits. In addition to cycling, CamelBak has Hands-Free Hydration systems for hiking, running, snowboarding and skiing. CamelBak’s state-of-the-art packs and hydration systems have benefited athletes, outdoorsmen, and soldiers around the world. While CamelBak has grown tremendously since the early days, one thing hasn't changed: CamelBak still believes in the performance advantage that proper hydration delivers for just about any activity. The privately-held company is headquartered in Petaluma, California.