Produced with 100% merino wool, the 260 Tech Long Sleeve sits next to the skin, working as a layer of insulation and breathing to regulate temperature when warm, wicking away unwanted perspiration. Odour resistant, it also won't matter if you're on a longer trip away from washing facilities. Plus, because it was made in the mountains rather than in a petrochemical laboratory, this Merino wool fibre is naturally renewable, recyclable and biodegradable* (*wool tops, under certain conditions). Gusseted underarms and forward side seams improve the range of motion and prevent chafing when moving fast and wearing a pack while a drop tail hem adds extra coverage.