Protects Surge™ Valve from whatever the trail dishes up. Designed for mountain bikers, gravel grinders, and all weather roadies. Opens and closes with one hand - seals valve when closed.
MuckGuard only. Surge™ Cap sold separately. Fits all newer model 12oz, 20oz, 24oz Polar Bottles.
Please verify cap compatibility before purchase. Compatible with Surge Caps only. Does not fit bottles with Sport Caps.