Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's Wetsuits A no-frills mitt with GORE-TEX

A no-frills mitt with GORE-TEX waterproofing—everything you need and nothing you don't

Insulation: 60 gsm Repreve® polyester

The Heli has a longer cuff

1 and EN 166 standards

High collar for comfort

Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's Wetsuits A no-frills mitt with GORE-TEXSmartwool Classic Thermal Merino Base Layer 1 4 Zip Men's 2026 Smartwool Baselayer Top We've updated the fit of our Men's Merino 250 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