The MeCo 165 Long Sleeve Zip tee is a long sleeved, zip neck base layer made from 165gsm MeCo fabric. The MeCo fabric is an intimate blend of 65% ethically sourced Australian Merino wool combined with 35% recycled polyester with Cocona® activated carbon technology. Cocona® fabric is made using natural technology. Activated carbon is derived from discarded coconut shells and other natural micro porous particles. These particles are contaned within the fiber and can not wear out or wash off.