Go all in on cold-weather adventures with the Smartwool Men's Intraknit Thermal Merino Base Layer Hoodie. Built for high-output days in the mountains, this heavyweight base layer combines the natural temperature regulation of Merino wool with innovative 3D-knit construction to deliver warmth, breathability, and unrestricted movement. Body-mapped insulation and mesh ventilation help regulate your temperature as you work hard, while the slim fit layers easily under your ski jacket or shell. A helmet-compatible hood, extended collar, and thumbholes add coverage where you need it most, making this a go-to layer for everything from resort laps and backcountry tours to winter hikes and snowshoeing.
Merino wool blend for natural temperature regulation, moisture management, and odor resistance
Seamlessly knit mesh ventilation to help manage heat during high-output activities
Helmet-compatible hood, extended collar, and thumbholes for added coverage and a secure fit
Slim, body-hugging fit for comfortable layering under outerwear
Winter 2026/27 product
Smartwool Intraknit Thermal Merino Base Layer Hoodie - Men's
