Details The Nathan VaporAir 3.0 7 Liter Hydration Pack is the next generation in the award-winning VaporAir/Airess vest series. By incorporating new materials, hardware and pocket design, these new Vapor vests are the best version yet. Notable updates include newly exposed air mesh shoulder straps, colorful bungee cords on front shoulders and back center panel for additional storage options, low profile hardware on sternum straps and new back zipper pocket that is easier to access when you're on the run. Material 60% Nylon, 40% Polyester Volume Equipped with a 2L bladder with quick-release valve Front pockets fit bottles and flasks up to 22oz Size Storage Capacity: 7 Liters - 427 Cu. In Extended kangaroo pocket for more storage Details Adaptive-Fit Adjustable Sizing System provides a tailored, body-mapped fit ideal for most body types with newly added expanded size of 1XL - 3XL Two zippered storage pockets near Adaptive Fit straps ideal for valuables and electronics Two layers of moisture-wicking air mesh on shoulder straps and back interior that provide maximum breathability and comfort Breathable, chafe-free binding for maximum comfort Contoured Chimney back panel construction for maximum airflow Storage loops on both sides are ideal for trekking poles Reflective hits for 360-degree visibility Weight Weight with bladder: 13oz / 376g Weight w/o bladder: 8.8oz / 227g Nathan Vapor Air 3.0 7 Liter Hydration Pack Men's