We put all of our smarts into these new and improved run socks that feature our 4 Degree elite fit system, ReliaWool technology for superior durability and a virtually seamless toe. Men's-specific mesh ventilation zones provide ultimate temperature and moisture regulation where male runners need it most.<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>ReliaWool:</b> Patented ReliaWool technology in high impact areas provides superior durability<br><br><b>Mesh Venting:</b> Men's-specific mesh ventilation zones provide additional breathability and moisture management<b><br><br>Ultra Light Cushion:</b> Minimal cushioning for maximum next-to-foot performance without added bulk<br><br><b>Care:</b> Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.