Warm feet = happy sailors! Wearing a pair of wetsuit socks under your boots for dinghy sailing will not only help keep your feet warm, they will also help keep your feet dry when launching. Don't get wet feet in the first place and your feet will stay a lot warmer.They also help prevent rubbing and blisters from dinghy boots. Choose from 2mm, 3mm or 4mm socks to wear with your boots, but keep in mind that you may need to go up a size in your boots to fit a pair of 4mm wetsuit sock