The Neoprene Socks from Immersion Research No one likes to get cold feet. IR Neoprene Socks are a simple, insulating sock made with 2mm neoprene. Perfect to wear under river shoes or sneakers to keep your feet warm on the water. Seams are glued and stitched, and the sole is screened with a reinforcing silicone print. Specifications Size XS-XXL Weight 1 lbs Normally Ships in 0 to 2 Business Days Features Benefits US Men's Sizing XSmall: 6-7 | Small: 8-9 | Medium: 9-10 | Large: 10-11 | XL: 11-12 | 2XL: 12-13. US Women's Sizing XSmall: 7-8 | Small: 9-10 | Medium: 10-11 | Large: 11-12. Fast-Drying Will dry quickly in the sun. Neoprene 2mm neoprene stretches to provide a snug fit. Guaranteed Workmanship and Performance