The Xeros Jacket is a super-lightweight and highly protective down jacket designed by Mountain Equipment for the hardest modern Alpine routes. Part of an extended R&D project with some of the best Alpinists in the world, this minimalist down jacket has been developed to offer maximum protection and warmth for the least possible weight and pack size. With a GORE-TEX INFINIUM™ drop outer shell, insulation and weather resistance are optimised. The Xeros Jacket is filled with 124g of premium quality 800 fill-power Russian goose down, ethically sourced in accordance with the Down Codex to ensure high standards of animal welfare. Xeros Down Jacket - Women's