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wrappers and other on-the-fly essentials
such as Thermal-X
open water swimming
This means no need for a purge valve
Big Bite Valve resync wrappers and other on-the-fly essentialsThe patented Big Bite Valve mouthpiece offers hands free hydration and is ideal for any high performance situation. Self seals after each drink to eliminate annoying drips. One piece silicone design includes no moving parts to break Self seals after each drink to eliminate annoying drips
