Smartwool Classic Thermal Merino Base Layer Pattern 1/4 Zip Women's Summit-Multipitch Packs 0 R-Value is warm enough

0 R-Value is warm enough for all but the coldest ground

Stretch Mesh Internal Gaiter with Power Strap Slot

The chromoly steel construction is lightweight

Haul bag inspired flat base

guaranteed

Smartwool Classic Thermal Merino Base Layer Pattern 1/4 Zip Women's Summit-Multipitch Packs 0 R-Value is warm enoughOur new and improved Women's Classic Thermal Merino Base Layer Pattern 1 4 Zip is here to bring you a better feeling, better performing, and better looking garment. As one of our 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