evo.com | Smartwool Long Underwear Bottoms > For a premium base layer that will keep you going in the coldest of conditions, try the Smartwool Classic Thermal Merino Base Layer 3/4 Bottoms. These long johns feature a form-fitting cut that can be worn during your favorite workouts in addition to under your ski pants, and feature a boot-top length for a no-bunch fit. Slim Fit Flatlock Seam Construction Designed to Eliminate Chafing Fabric Weight | Mid 250 Single layer for cold weather performance. Baselayer for very cold weather. Merino-Covered Elastic Waistband 100% Merino Wool Made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. | Smartwool Classic Thermal Base Layer 3/4 Bottoms Men's 2026 - X-Large Gray