DetailsLasting Size Chart The Will sweatshirt is made of 100% sustainably sourced Australian Merino wool. It has a front zipper around the collar. The sweatshirt is made of a two-layer smooth knit made of the finest fiber and will not scratch or itch. Flat seams ensure wearing comfort. The wool is highly antibacterial and ensures moisture wicking, so you will still feel dry and odor free even when you sweat. Use it as a second layer for winter sports and casual wear.