Introducing the Unisex Hypernight Quickstart 4 Liter Hydration Pack by Nathan Sports, designed for superior visibility with an expansive reflective geometric print. This minimalist backpack in Black/Geo offers comfort for runners of all levels, featuring a 1.5L hydration bladder and front storage accommodating nutrition and most large smartphones. It includes front bottle pockets for flasks up to 22oz and adjustable straps ensuring a perfect fit, while the soft perimeter binding prevents chafing. Weight - 12.4oz with the bladder and 7.2oz without, with a storage capacity of 244 cu in / 4L, making it an ideal companion for training in low-light conditions.