A wind-blocking bit of kit that doesn't cost the earth. Windchill is the main issue with loss of body heat while out on the bike. The RST Thermal Wind Block Gilet features a wind-blocking fabric construction to minimise body heat loss and to remain comfortable when out riding. The RST Thermal Wind Block fabric is not just windproof; it is enhanced with 4-way stretch panels and compression properties that help maintain core body temperature by keeping the muscles warm, reducing fatigue.