The Ibex Wool Arm warmers are constructed from fabric that is made with New Zealand Merino wool mixed with a small amount of nylon and Lycra® for strength and a snug fit that still allows movement. Wool provides the greatest temperature regulation of any natural fabric, making it ideal in varying temperatures. The Ibex Wool Arm Warmers feature flat seams for comfort, are made in the USA, machine washable and retail for $40.00. For more information visit. www.ibexwear.com