Amphipod Micro-Stretch Belt Color:Gray it’s Nathan's first race vest

it’s Nathan's first race vest to feature the innovative Adaptive-Fit ™ Adjustable Sizing System

soft flask with bite valve to keep liquids from escaping

Stretch knit fabric with brushed lining for warmth and comfort

you can size your Zipster to fit you perfectly

medium fitting boots and more

Amphipod Micro-Stretch Belt Color:Gray it’s Nathan's first race vestSuper minimalist way to carry essentials! Ultra comfortable, ultra light, no bounce stretch pouch for essentials expands more than 4x to fit you basic essentials. Fully adjustable stretch belt expands to 4 times its size Internal divider converts secure zipper pouch to a larger capacity Perfect for carrying nutrition, music and essentials Add on Race Lite number tabs make for a great race day solution AirFlow Microstretch pocket 9" x 2" (expands to