Here's what other sites are saying:
Extra THORLON provides a maximum running density padding to provide better durability, protection against shock, impact and shear forces. THORLON top with added spandex provides protection and better fit. Lightweight padding in arch for better fit and arch support. Level 3 Protection: Provides the maximum protection for the most rugged and challenging activities and weather conditions.
- Altrec Outdoors
High-density pads in the heel and ball protect against shock, abrasion and blisters. Low-density padding in the arch provides contour fit and comfort.Protection Level 385% Foot-Health acrylic, 13% stretch nylon and 2% spandex.Approx. Length: M(9 in.), L(10 in.), XL(10 in.).Avg. wt. 3.5 oz.Made in USA.Thor Lo's Protection LevelsThree simple level designations will help you to pick the Thor Los that are right for your activity. Both thickness and density (padding) have been taken into consideration when assigning Level of Protection to each Thor Los style. Each style features padding engineered to protect your feet for the intended usage.Protection Level 3 - Maximum protection for the most rugged and challenging activites and weather conditions.Protection Level 2 - Moderate protection for those activites that are somewhat strenuous but are not of long duration.Protection Level 1 - Minimum protection for those activities that range from casual/leisure to 'walks in the park'.
Thorlo Running Socks - Thick Cushion Mini-Crew with THOR-LON
Thorlo Running Socks - Thick Cushion Micro Mini-Crew with THOR-LON
Thorlo Running Sock - Thin Cushion Mini-Crew with CoolMax
Thorlo Trail Running Sock - Moderate Cushion
Darn Tough Merino 1/4 Sock Cushion
$17 - $18
Thorlo Experia Merino Wool/Silk - Thin Cushion Micro Mini-Crew
$10 - $14
WrightSock CoolMesh II Quarter Sock
$7 - $12
Darn Tough Merino 1/4 Sock Mesh
$16 - $49