The full-zip vest has a double-layer collar, a straight bottom hem, and is made from circular knit fabric. The collar features the knitted Woolpower logo. Ullfrotté Original 400 gram can be used in colder conditions or when you don't intend to move around much. It is then best to wear one of our thinner base layers underneath, such as Woolpower LITE or Ullfrotté 200, which are designed to be worn closest to the body. By wearing Woolpower directly on your skin, you benefit most from all the good properties of wool. 70% Merino wool 28% Polyamide 2% Elastane