Designed for mountain bikers, gravel grinders and all weather roadies, the breakaway muck insulated water bottle features a Muckguard cap cover that protects the surge valve from whatever the trail dishes up. The high-flow surge cap provides a sip or blast of water and self-seals to eliminate spills and splatter, even on your bumpiest rides. Tri-Layer insulation and radiant heat reflective technology keep your liquids cool twice as long, so you can stay cool on long and dusty days in the saddle.