The MeCo is a mix of 65% ethically sourced merino wool and 35% recycled polyester with Cocona technology which helps the material dry five-times more quickly and gives better odour protection than with 100% merino fabrics.
The pants are lightweight (120g/m2) and extremely soft and comfy, with a low bulk waistband and flatlock seams, and although you wouldn't use them in really cold conditions, as a base layer for high energy activities or less cold weather they're ideal - you hardly notice you're wearing them in fact.
