Fit & Design: Ultra light and minimalist, breathable MircoMesh(TM) compartment construction with reflective detail Breathable, non-confining, fully adjustable comfort waist belt with ergonomic low-profile quick-release buckle Perfect for carrying nutrition, phone, and essentials Internal divider converts zippered pouch into 4x expandable storage Additional Details: Belt Width: 1.5" Storage: 10.25" x 4" (expandable to 4x)