Smartwool Men's Classic Thermal Merino Base Layer 1/4 Zip - Mink Color Shift

The listed fiber composition was extracted from the source below, then scored deterministically: each fiber carries a plastic weight (polyester 100, viscose 10, cotton 0) and the score is the percentage-weighted plastic share. Confidence: high.

smartwool.com/en-us/products/mens-classic-thermal-merino-base-layer-1- — “Made with 100% Merino wool for natural sweat management, odor-resistance, and temperature regulation.”