Pocket expands to 4 times its size! ï‚·Internal divider converts secure zipper pouch to a larger capacityï‚·Ultralight and minimalistï‚·Perfect for carrying nutrition, phones and essentialsï‚·Add-on Amphipod Race-Lite™ Number tabs make for a great race-day solutionï‚·Breathable AirFlow Micromesh™ï‚·Breathable, non-confining fully-adjustable comfort waist belt with ergonomic quick-release buckleï‚·Also available with a smaller pocket AirFlow MicroStretch™ BeltSizing: Comfort-stretch belt is adjustable to fit from 28" to 50" waist