A warmer, midweight version of our best-selling Oasis, the 260 Tech Long Sleeve Half Zip is a go-to piece for winter layering, made with 100% merino wool. The Men's 260 Tech Long Sleeve Half Zip Top from Icebreaker is a versatile baselayer design in a midweight, zip-neck design. The updated 260 Tech Long Sleeve Half Zip is a go-to foundation for cold-weather layering, whether you’re scoring a powder day at the resort or enjoying a quiet hike through the woods. Made from 100% merino wool jersey fabric with a deep front zip that quickly dumps excess heat, the Tech Long Sleeve Crewe insulates next-to-skin, breathes to regulate temperature and resists odours on active days or long stints away from home. Gusseted underarms, forward side seams and offset shoulder seams improve range of motion and prevent chafing when you’re moving fast or wearing a pack.