As the newest evolution in taste-free hydration, the Big Zip EVO delivers a significant 50% increase in flow rate from its predecessor, so you feel satisfied with less slurping. This lumbar is a great option for day hikes and mountain bike adventures when you carry a smaller lumbar pack instead of a full backpack. The silver-ion in the materials keeps the reservoir fresh and bacteria-free.
- Secure zip-seal for easy opening, closing and filling.
- Pincher grip helps with one-handed filling.
- HyFlow bite valve improves flow.
- Shut-off valve is leak-proof and ideal for stowing.
- Easy to clean, thanks to the wide opening and rounded corners.
- Embedded silver-ion protects clean water from mold and bacteria.
- Semi-rigid baffle helps keep reservoir open to help it dry faster and with less fuss.
- All materials are certified food-grade, BPA-, BPS-, phthalate-free and taste-free, guaranteed.
|Bite valve shut-off switch||Yes|
Internal baffles help reduce liquid sloshing.