Midweight base layer bottoms perfect for skiing, winter hiking, or cold-weather layering, the 260 Tech Leggings are a warmer version of our best-selling Oasis Leggings, made with 100% merino wool.

Smartwool's Women's Classic All-Season Merino Base Layer Bottoms are the perfect layer to put on for your warm-weather adventures.

Made of lightweight, breathable Merino, these base layer pants have an updated fit that improves functionality while enhancing aesthetics for a wide range of body shapes. We wrapped our super-soft, responsibly sourced Merino around a nylon core to give it added durability, so it can keep up with you.

Wherever you're going and whatever you're doing, our lightest weight base layer bottoms are perfect for adventures during all seasons.