The versatile Men's Tech Long Sleeve Crewe Stripe is a highlyinsulating base layer made from merino fabric to keep your body at an ideal temperature while enjoying the outdoors. Offset shoulder seams prevent pack rub & a dropped rear hem provides extra back coverage. Icebreaker Merino wool fabrics are naturally lightweight, breathable & highly insulating, providing an extraordinarily effective means of regulating your body temperature. In cold conditions, the fibres trap millions of tiny pockets of air to insulate your body from the cold. In hot conditions the fibres transport sweat & water vapour away from your body to keep you cool. The fibres also naturally inhibit the growth of bacteria that cause odours so you can wear the garments for days without the need to wash them.