The Platypus’ Big Zip SL is a premium hydration system loaded with improved features like a new easy-to-clean wide-mouth SlideLock™ closure, with secondary reinforcement that ensures an easy and solid closure every time. Platypus also added a quick-disconnect fitting so you can remove, clean and refill your Big Zip SL without re-routing your hose. Platypus Big Zip SL Features
New materials increase durability and flexibility.
New SlideLock close ensures a secure and easy closure every time.
Quick-connect fitting allows you to remove from pack without re-routing drink tube.
New SlimeGuard™ anti-microbial treatment keeps your water fresh and taste-free.
HyperFlow™ bite valve offers the highest flow rate on the market.
Ergonomic shutoff valve is angled at 90º for no-hassle, hands-free hydration. Platypus Big Zip SL bladders are durable and efficient.