Smartwool Men's Classic Thermal Merino Base Layer 1/4 Zip Mens Shoes TPU-injected Speedboard® allows for more

TPU-injected Speedboard® allows for more forefoot flex

grip and waterproof protection you need to tackle technical terrain

ASICSGRIP™ outsole rubber improves durability and grip

EXO Shield 30k 4-way stretch recycled polyester plain weave with 30k/20k laminate and PFC-free DWR

Smartwool Men's Classic Thermal Merino Base Layer 1/4 Zip Mens Shoes TPU-injected Speedboard® allows for moreWe've updated the fit of our Men's Classic Thermal Merino Base Layer 1 4 Zip to improve functionality while also enhancing aesthetics. 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 help keep you comfortable and temperature regulated as you enjoy high intensity skiing, hiking,