Have been buying this brand for about 13 years and still have some of those first shirts. Unlike ANY other cheaper brand of wool. Tried them all. Exercise daily, bike, run, lift weights, row. This is the shirt I'm wearing, black or grey. Despite frequent washing without following any instructions, they walk and walk. Some of the smaller competitors have had holes or tears for weeks or months. I measure the icebreaker in decades. Also, it sits better on me as it falls over my shoulders without rolling or rolling into my shoulders like the others.