The flip-up Muckguard protects the Surge™ valve from dust, mud and grit. It opens with one hand and seals the valve when closed. Fits all HydraPak Squeeze Bottles and newer model Polar Bottles with a Surge Cap (12oz, 20oz, 24oz, 30oz sizes).

Muckguard only. Surge™ Cap sold separately.

 **Please verify cap compatibility before purchase. Compatible with New Surge & Sport Caps only. Does not fit older Polar Bottle caps.