Internal perforated dynamic neoprene contours and supports the tendon & fetlock with breathable Bamboo inner lining and outer 3D Mesh. Forward facing vents force incoming air to circulate and cool the tendons whilst top vents release rising heat. Minimal in profile, structure and weight, avoiding unnecessary bulk at the point of passing over a pole. 25mm & 30mm rotating strap width are inter-changeable with three length options.