About this item COMPATIBLE - With all hydration vests that fit a 1.6L Bladder. NATHAN COMPATIBLE - Fits Nathan Pinnacle 4L and 12L, VaporHowe 2.0 (12L) and VaporKrar 2.0 (12L)...

18oz / 535mL BPA-FREE soft flask with bite valve The rigid ExoSpine™ for superior hand feel and support Ergo-designed hand strap provides grip-free comfort Breathable wicking mesh underhand position provides...

BEST RUNNING VEST REPLACEMENT: A perfect fit for most standard hydration vests with an ergonomic Slider Top to reduce chafing. SLIM PROFILE: Designed to eliminate sloshing and be more comfortable...