Lightweight, essential and highly technical, the UYN CORESHELL vest offers the cross-country skier smart protection. The front is engineered with the exclusive MEMBRAIN115 membrane to stop wind and water from penetrating. In the inner layer, BUFFERCONE fabric retains body heat thanks to its micro cone structure - the most advanced form of insulation ever applied to a softshell. Moisture produced by the body during activity escapes at the sides and back, where a more open fabric construction ensures optimal breathability.