Icebreaker uses the best superfine merino in the world, from the mountains of New Zealand. In contrast to synthetics, the Icebreaker merino fabric is finer, softer, more insulating, and more breathable than alternative fabric types. The lightweight, odor-resistant, and soft-against-the-skin fabric breathes better than other garments because each individual merino fiber breathes as well as the fabric allowing your body to release moisture vapor so that you never feel clammy.
The Sport320 Original Zip Top has a 1/4 length front zip with a high, stand-up rib collar to shield the neck. Thumb loops keep the garment in place and are great for biking and skiing. The all-natural merino fabric features a circular knit that offers a natural stretch that will maintain its shape over years of use. Easy to care for, the Sport320 Original Zip Top is machine washable and fast drying. Additionally, this fabric will not absorb odors as synthetic fabrics do. Great for traveling, this all-purpose mid-layer wears perfectly over base layers in cool to freezing temperatures and is great under shell jackets.
About Icebreaker Merino Wool
Icebreaker uses the best superfine merino in the world, from the mountains of New Zealand in all of its garments. Icebreaker's merino fiber was created by nature to protect animals in the harsh environment of New Zealand's Southern Alps. If the fiber didn't work, the animals wouldn't survive. Recognizing that it couldn't design a better fiber, Icebreaker turned nature's merino wool into a clothing system for humans. In contrast to synthetics, Icebreaker merino is 100 percent natural. The fabric created is finer, softer, more insulating, and more breathable than alternative fabric types.
Icebreaker merino forms a buffer zone around your body, keeping you at an ideal temperature in all climates and conditions. It's also lightweight, odor-resistant and soft against the skin--all qualities that will help you to perform at your peak. Because Icebreaker merino fibers are so fine, they are naturally more breathable, so you stay cool in the hottest conditions. It feels very different than synthetics, where breathability is limited.
Icebreaker garments breath better than other garments because each individual merino fiber breathes as well as the fabric allowing your body to release moisture vapor so that you never feel clammy. In a warm, high aerobic environment, sweat is pulled from the body into the fabric, and dispersed and metabolized as moisture vapor through the outside of the garment, cooling the body through evaporation. In cold temperatures, when moisture is absorbed from the cold air, Icebreaker merino fibers liberate heat through a molecular process call "heat of sorption" to keep you warm.