The Vest Made to Inspire Your First Trail Race Plush next-to-body materials and fully adjustable Comfort Glide fit system make the Trail Vest your comfiest piece of gear for training runs and trail races. Paired with a 1.5L reservoir (included), water bottle pockets and secure storage throughout, this vest has everything you need to hit the trails. Features Comfort glide back adjuster system for full body adjustabliity Comes in 2 sizes for customizable fit Comes with a 1.5L reservoir so you have everything you need to run your first ultra. Large back pocket can hold up to a 2 liter resivoir. Up front bottle pockets can hold up to a Body Bottle 500. Secure front mesh pocket capable of fitting a phone. Rear mesh stash pocket. Easy access main pocket with quick auto closure. Materials 100% polyester Specs Weight (without bottles): 7.58 oz / 215 g Volume: 330 in 3 / 5.41L | Ultimate Direction Trail Vest in Onyx Size Medium/Large