Cotton is a renewable material, and a relatively non-problematic waste as the product reaches the end of its service life. That won't be any time soon with this tee, though, as Peak Performance uses high quality materials - you'll easily notice the difference between this and cheap alternatives. The Oricinal is a good choice for relaxed spare time, and warm conditions. Machine wash at 40ºC. The model in the "Morning Dew" color photos is 175 cm tall and is wearing a size S shirt. The model in the "Blue Shadow / Off White" color photos is 172 cm tall and is also wearing a size S shirt.