Super lightweight insulation for when every gram counts. The Men\'s Arete Hooded Jacket from Mountain Equipment is a minimalist jacket that uses a durable water resistant down fill to give a boost of warmth for pre-dawn starts and extended belays. It features a full length zip along with hand warmer pockets, one of which doubles into the stuff bag for the jacket, so it shouldn\'t take up too much space in your pack, while the hood is also insulated for excellent heat retention when the mercury falls.