Big Zip EVO Reservoir Bike Maximum ventilation and a design

Maximum ventilation and a design that integrates with our helmets make these goggles a no-brainer when high speed is on your agenda

a rubberized nylon used to provide extra protection against friction and abrasion

3 includes Park Tool's tried and true cam-actuated micro-adjustable clamp design for quick one-handed entry and exit

Seamless 4-way stretch construction designed for high intensity workouts

Big Zip EVO Reservoir Bike Maximum ventilation and a designIntroducing the Big Zip EVOthe latest evolution in taste free hydration. The Big Zip EVO delivers a significantly higher flow rate than previous Platypus reservoirs and a host of new features, making it a great option for backpackers, hikers, and mountain bikers.