Designed for: Hiking in moderate climates, on varied terrain.

Fiber Contents: 87% Exclusive THOR•LON® Acrylic, 11% Stretch nylon, 2% Spandex 

1 - Exclusive THOR•LON® construction for resilience, durability and better wicking.

2 - Thick cushioning cushioning in ball/heel for reducing shock, impact, shear and blisters.

3 - Moderate cushioning - at instep for protection against boot pressure/in arch for better fit ... spandex added for support.

4 - Ventilation panel for better wicking.

30 Day Money Back Guarantee
30 Day No Risk Trial. Thorlos feel better than your "ordinary socks" or your money back! Proper shoe fit required.  Send the Thorlo socks directly to Thorlo Inc. for a refund.   Include your dated sales receipt and return address for quick response.

Quatro Boot Size     Sock Size     USA Men's Shoe Size

5-7                                 M                          5.5-8.5

8-11                               L                           9-12.5

12-15                             XL                        13-15