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Product description Smartwool PhD Run Ultra Light Pattern Micro Socks

Our PhD® Run Ultra Light Pattern Micro socks bring together the comfort of Merino with body-mapped mesh zones for added breathability and an Achilles tab to help prevent sock slippage while providing you with a sock that can handle it all. Featuring our 4 Degree™ elite fit system for a dialed, performance-oriented fit, Indestructawool™ technology for enhanced durability, and Shred Shield™ technology to reduce wear from toes, our thinnest running sock helps keep you comfortable in your low-cut running shoes for the long road ahead.


4 Degree™ Elite Fit System:
- For a dialed, performance-oriented fit with a flex zone at the ankle joint

- Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort

Mesh Venting:
- Mesh ventilation zones provide optimum moisture management and maximum breathability

- Built for Performance in the Highest Degree

Shred Shield:
- Shred Shield helps reduce wear from toes

Ultra-Light Cushion:
- Minimal cushioning for maximum next-to-foot performance without added bulk

Light Elite Cushioning:
- Targeted cushioning on toe and heel designed to provide comfort and protection without adding bulk
- 4 Degree™ elite fit system for a dialed-in, performance-oriented fit
- Body-mapped mesh zones for added breathability
- Virtually Seamless™ toe for enhanced comfort
- Achilles tab designed to prevent the sock from slipping down into footwear


- 46% Merino Wool 50% Nylon 4% Elastane


- Machine Wash Warm
- Wash Inside Out.
- Do Not Bleach.
- Tumble Dry Low.
- Do Not Iron
- Do Not Dry Clean.