Merino Wool

Smartwool has updated the fit of their Women's 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their heaviest base layer tops 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 keep you comfortable and temperature-regulated as you enjoy high-intensity skiing, hiking, running, and more.

This minimalist-style crew is anything but insignificant. The Women's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-moveable top, made for all of your most extreme cold-weather activities. With Merino Sport yarns and gender-specific ventilation perfectly placed to maximize thermoregulation and breathability in high-intensity activities, it helps amplify moisture management, movement, and comfort. When you're in our best base layers, you're ready for anything.

A midweight merino base layer top designed to help regulate temperature during high-intensity activity, the 200 ZoneKnit™ Long Sleeve Crewe features 100% pure and natural merino wool.

A cold-weather women’s merino wool top, the Women’s Tech Long Sleeve Crewe is a midweight base layer for skiing, snowshoeing and other winter pursuits. With the soft merino fibers, they will help regulate the body's temperature, no matter weather conditions while also resisting odors.

A warmer, midweight version of Icebreaker's best-selling Oasis, the 260 Tech Long Sleeve Half Zip is a go-to piece for winter layering, made with 100% merino wool.

An incredibly warm merino base layer for the coldest months of the year, the 260 Tech Long Sleeve Turtleneck is a go-to piece for winter layering—ideal for skiing, snowshoeing and other cold-weather pursuits.

A heavyweight merino base layer top designed to help regulate temperature during high-intensity activity, the 260 ZoneKnit™ Long Sleeve Crewe features 100% natural merino wool.