The Sockwell Bart men's compression is a simple, stylish and comfortable sock. The Bart graduated compression sock is spun with high-performing and good-feeling cashmerino/bamboo rayon with great arch support and seamless toe closure. This moderate compression (15-20 mmHg) design helps in improving circulation when you need or want extra support in your day. Men's size M/L fits about men's shoe size 7-10 and men's size L/XL is about 10.5-13.