Smartwool Merino 250 Baselayer 1/4 Zip Top

The heaviest base layer top and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

Designed to keep you comfortable and warm on any outdoor adventure, the Smartwool Merino 250 Baselayer 1/4 Zip Top is the perfect addition to your walking wardrobe. Constructed using a 100% Merino wool, the Zip Top offers breathable warmth, wicks sweat away from the body, and provides next to skin comfort. The heavier, soft, 100% Merino wool fabric is thinner and softer than regular wool, making it more comfortable to wear next to skin. It works to keep your body at a stable temperature - when it's cold outside, the natural crimps and bends in its fibres trap air, insulating you. When it's warm outside, it transports sweat quickly away from the skin, helping to keep you cool and dry. Merino wool transports sweat and moisture away from the skin as a vapour. Merino fibres are inherently porous, composed of little plates that moisture vapour can get in between-meaning you're not left feeling wet, cold, and clammy after a workout. Merino wool is unique in that it absorbs odour caused by bacteria, trapping their smell and keeping them from building up. An updated fit improves functionality whilst enhancing comfort; the fit sits comfortably against the skin without restricting your natural motion so you can go further for longer in complete comfort. Shoulder panels eliminate top shoulder seams. The back body seam wraps to the front of the top, for a body-enhancing, flattering and comfortable fit. Flatlock seams used throughout the top are designed to minimise chafing and skin irritation, making this base layer as comfortable as possible. The 1/4 zip makes this top perfect for layering but also puts you in complete temperature control. Simply zip up to retain all-important body heat, or zip down for some extra ventilation when things heat up.