Crafted from our unique Ullfrotté Original 400 fabric, the Full Zip Jacket 400 can be used in colder conditions or to keep warm when you don’t intend to move around much. When you’re planning to be less active or sitting in a tree stand, pair the Full Zip Jacket with one of our thinner base layers underneath, such as Woolpower LITE or Ullfrotté 200, that are designed to be worn closest to the body. By wearing Woolpower directly against your skin you gain the most benefit from all the good properties that wool has.