Lightweight Thermal Hi-vis from GripGrab is a soft, thin and insulating cap that fits perfectly under your bicycle helmet. The color helps to increase your visibility in traffic, whether you are cycling or running in cold and dark winter conditions.\n\n\nFabric: 85% Polyester, 15% Elastane Gripgrab Lightweight Thermal Hi-vis Yellow Hi-vis | Buy Gripgrab Lightweight Thermal Hi-vis Yellow Hi-vis here | Outnorth