The PhD Outdoor Light micro is made for the trail. Featuring Indestructawool technology for ultimate durability, we've designed these socks to outlast your greatest adventures. And with features like mesh zones for maximum breathability, a Virtually Seamless toe and the power of Merino, they'll help keep you comfortable every step of the way.<br><br><b>PhD:</b> Built for Performance in the Highest Degree<br><br><b>4 Degree Elite Fit System:</b> Uses two elastics for greater stretch and recovery to keep the sock in place<br><br><b>Indestructawool:</b> Indestructawool technology features a patent-pending construction method for exceptional durability and comfort<br><br><b>Mesh Venting:</b> Mesh ventilation zones provide optimum moisture management and maximum breathability<br><br><b>Light Cushion:</b> The ideal cushion for varied trail and road terrain<br><br><b>Care Instructions:</b> Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.