The Full Zip Jacket 400 has a double-layer high collar and cuffs with thumbholes. The back is longer to prevent gaps, and the collar features the knitted Woolpower logo. Ullfrotté Original 400 grams can be used in colder conditions or when you don't plan to move around much. In this case, it's best to wear one of our thinner base layers underneath, such as Woolpower LITE or Ullfrotté 200, designed to be worn closest to the body. By wearing Woolpower directly on your skin, you maximize all the good properties of the wool. 70% merino wool 28% polyamide 2% elastane