The video shows how Icebreaker merino pretty much fully biodegraded after nine months. In comparison, polyester knit fabrics did not degrade at all during the course of the nine-month trial period. If you're worried about your environmental footprint, and we all should be, this makes merino rather attractive, especially considering it is a natural fiber to begin with. Speaking of which, are you wondering how Icebreaker merino apparel is made? Just click here.
I can only question the utility of this test in that who in their right mind would throw out a merino shirt? As someone how is very good a losing things, I know that's besides the point, I just felt the need to share my love of merino : )