Nathan Trail Mix Plus 3.0 Running Waist Pack with Insulated Flask and Phone Pocket — No-Bounce Hydration Belt for Hikes, Walks & Runs

Fit & Sizing: Designed as one-size-fits-most to accommodate a wide range of runners; Design Philosophy: Part of Nathan’s performance-oriented accessories, engineered for durability and intuitive function to support long-distance training; Hydration Performance: The Trail Mix Plus 3.0 combines updated materials and pocket layouts with an improved flask holster for one-handed removal and anti-bounce tech to keep the belt stable; Key Features: Large expandable front zip pocket fits most phones, external mesh storage pocket, two shock cords with tension locks at the sides, and elastic keepers to manage excess straps; Specs: 8 oz (without flask), 10 oz (with flask), 0.5 L (30.5 cu in) storage — a lightweight option for runners.