Grundéns Boot Sock Thermal – Built for the Coldest Days on Deck Maximum Warmth. Lifetime Comfort. When the weather turns bitter and your boots are your best friends, the Grundéns Boot Sock Thermal steps in with unmatched warmth and comfort. Featuring 38% Merino Wool, the highest in the Grundéns sock lineup, these socks naturally insulate, wick moisture, and fight odor—keeping your feet dry, warm, and fresh on the longest, coldest missions. Crafted with high-power instep elastic to prevent blisters and nylon-reinforced heel and toe zones for lasting durability, the Boot Sock Thermal is performance-driven from the inside out. Sustainably sourced and made in the USA, each pair is backed by Grundéns' Lifetime Sock Warranty—because these socks are built to outlast the elements. Key Features: 38% Merino Wool – the most insulating sock in the Grundéns lineup Moisture-Wicking & Antimicrobial – stay dry and odor-free all day Instep Compression – reduces blister risk and maintains fit Reinforced Heel & Toe – added durability in high-wear zones Made in the USA – sustainably sourced materials Lifetime Warranty – if they fail, we’ll replace them—no questions asked Style No.: 60021Ideal For: Cold weather fishing, hunting, and workwearFit: Boot height | Cushioned | Unisex Grundéns Boot Sock Thermal with 38% Merino Wool offers maximum insulation, moisture wicking, and blister protection—built in the USA and backed by a lifetime warranty.
