The outer shell is Cotton the inside is Merino. The merino layer on the inside will give you that extra warmth and softness vs. cotton. We have added our three admiral stripes on the waist band and the hem for extra strength. Overlock stitching to make it sturdy. The fabric / pant is woven, dyed, and sewn in Germany. The garments are made on loop wheel machines. You can wash it at 30% Wool Wash it will have a tiny bit of shrinkage like your favorite denim. After some wear it gets a little patina on the outside due to the merino wool on the inside depending on the use and amount of wear of the owner.