Design: Hydration - Two 14oz / 414ml NATHAN x HydraPak Soft Flasks with extended straws included Dual-Size Unisex Fit - Each vest size adjusts to comfortably fit two body sizes (S-M, L-XL, XXL) Custom Fit, On the Go - Sternum cord closures paired with Pinnacle QuickFit(TM) size adjustment system allows you to make micro-size adjustments on the run Easy Access Storage - Four front expandable power mesh pockets - two flask-ready with elastic cords and two for quick storage of small essentials plus one zippered pocket for valuables on front Rear Capacity Storage - Large back pocket for additional storage of essential items with a separate storage compartment for up to a 2L bladder (sold separately) 360deg Visibility - Reflective details enhance visibility in low-light conditions Storage Capacity - 4L / 244cu in Weight w/o Flasks - 5.3oz / 150g Weight with Flasks - 8oz / 226g Additional Details