The Smartwool Run Targeted Cushion Ankle Socks combine the moisture-wicking power of premium ZQ-certified merino wool with strategic impact protection. Built for both road and trail runners, these socks feature high-density cushioning exclusively on the heel and forefoot to absorb shock, while the rest of the sock remains ultralight and highly breathable. The ankle-height profile provides essential coverage against trail debris, and Smartwool's advanced fit systems ensure a blister-free ride that stays locked in place mile after mile.

Specs & Features

​Technical Specs

• ​Model Number: SW001661

• Height: Ankle (Sits just above the ankle bone for added protection against dirt and debris)
• ​Cushioning: Targeted Cushion (High-density padding isolated to the heel and ball of the foot; flat knit elsewhere)
• ​Material Composition: ~54% ZQ-certified Merino Wool, 12% Nylon, 30% Recycled Nylon, 4% Elastane

​Key Features

• ​4 Degree™ Elite Fit System: A highly responsive, multi-zone elastic construction that securely hugs the arch, instep, and heel to completely eliminate internal slipping and bunching.
• ​Indestructawool™ Technology: A patent-pending, heavily reinforced knitting method in high-wear impact zones that significantly increases the durability and lifespan of the sock.
• ​Virtually Seamless™ Toe: Removes bulky internal stitching across the toe box to prevent chafing, friction, and blisters inside snug running shoes.
• ​Targeted Mesh Ventilation: Body-mapped mesh channels over the top of the foot maximize airflow and accelerate moisture evaporation.

​Care Instructions

​To preserve the premium merino fibers and performance elastics, follow these steps:

• ​Wash: Machine wash warm or cold on a gentle cycle. Always wash inside out to flush sweat salts from the cushioned loops and prevent pilling on the outside. Wash with similar colors.
• ​Detergent: Use a mild liquid detergent. Never use fabric softeners or bleach, as they will coat the wool and permanently destroy its natural moisture-wicking and thermoregulating properties.
• ​Drying: Tumble dry on low heat, or line dry in the shade to maximize the lifespan of the elastane fibers.
• ​Ironing/Dry Cleaning: Do not iron. Do not dry clean.

​X-Boundaries Professional Tips

• ​The Trail Runner's Sweet Spot: The slightly taller "Ankle" height is absolutely perfect for gravel paths and muddy trails. It acts as a mini-gaiter, preventing rocks, dirt, and twigs from sneaking into your shoe while still looking sleek and athletic.
• ​Targeted Shock Absorption: Targeted cushioning is ideal for high-impact running on hard surfaces. It gives you protective padding exactly where your foot strikes the pavement, without the suffocating, heat-trapping bulk of a fully cushioned sock over the top of your foot.
• ​Wash to Snap Back: If the 4 Degree™ elastic ever feels like it's loosening after a grueling multi-day ultra event, simply washing them inside out and tumbling dry on low heat will cause the elastane to snap right back into its original, supportive shape.