Why you'll love it The VaporAiress 3.0 7L Vest is the next generation in the award-winning VaporAir/Airess series. By incorporating new materials, hardware and pocket design, these new Vapor vests are our 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. Highlights Maximum Breathability & Function: New 2-layer moisture-wicking air mesh on shoulder straps & back interior to provide maximum breathability & comfort while on your run. More Pockets, More Storage: New back zipper pocket for easy access on your run. Features colorful bungee cords on the front shoulder + back panel for additional storage. Plus storage loops on the side for trekking poles. Comfort Fit for All Body Types: Our Adaptive-Fit Adjustable Sizing System provides a tailored, body-mapped fit ideal for most body types with newly added expanded size of 1XL - 3XL. Features: 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 & back interior that provide maximum breathability & comfort Breathable, chafe-free binding for maximum comfort Equipped with a 2L bladder with quick-release valve Secure, front shoulder zippered pockets Front pockets fit bottles and flasks up to 22oz Contoured Chimney back panel construction for maximum airflow Extended kangaroo pocket for more storage Storage loops on both sides are ideal for trekking poles Reflective hits for 360-degree visibility Specifications: Storage Capacity: 7 Liters - 427 Cu. In Weight with bladder: 13oz / 376g Weight w/o bladder: 8.8oz / 227g Material: 60% Nylon, 40% Polyester