This hat is knit in 100% pure virgin wool, not reclaimed. This means the wool will last for many years to come. The yarn is a heather green. Very unique and difficult to capture the color. A heathered green with blue and gold...but it is very subtle. This hat is the same as my other men's hats, just in green. This winter hat is great for those that love the outdoors and want to be as warm as possible while out in it. Wool is a fabulous fiber in that it breathes and retains warmth even when damp. Medium will fit a head size 23-24 Large will fit 24"+ Care: hand wash, lay to dry.