The Womens 260 Tech Long Sleeve Half Zip Top from Icebreaker is the go-to cold-conditions baselayer for deep powder days at the resort, quiet snowshoe hikes and other frigid pursuits, the 260 Tech Long Sleeve Half Zip is reliable, highly versatile and extremely comfortable. Made with our heavyweight 100% merino wool jersey fabric with a zip-neck design for quick temperature adjustments, the Tech Crewe insulates, breathes and resists odors during active days or long trips away from home. Forward side seams and offset shoulder seams prevent chafing when you’re wearing a pack or moving fast.