We have developed this thermal and windproof vest with thinking about the occasions when you have to face big temperature changes: when you are climbing in altitude or during the long rides, when you leave at dawn in the icy air and get warm at the first rays of the sun. Thanks to its design and high-tech materials, it protects and warms the core while letting the back of the body breathe. On the front, protection is maximum thanks to a tripled-layer waterproof and windproof fabric bonded with UYN's intelligent MEMBRAIN115 membrane. The inner layer is made with bodymapped BUFFERCONE technology, which retains body heat and creates an insulating cushion. At the back, the lighter, breathable fabric allows moisture to escape to prevent condensation on the inside. The UYN CORESHELL vest is designed to be used in combination with a jacket or thermal shirt. Once folded, it takes up very little space and can be easily carried in the rear pocket.