My husband wears a 10.5-11 size shoe so we bought the 9-11.5 men’s size and they fit perfectly. He works in a shop all day wearing cross trainers. He is walking, climbing and squatting all day. He wears through regular sports low rise socks like they’re made of paper. He’s also had issues with low rise socks sinking into his shoe and getting blisters. So I bought these because they looked better made and hoped to invest in a higher quality sock would mean longevity and performance.These socks are thicker with specialty stitching in the arch area and a higher tab in the back. He wasn’t convinced to try the socks but I bought them so he tried them. After a full day working, he said, "they’re so comfortable”. The arch stitching is nice to give the sock a great shape and prevent bunching up. After all day in the 100° shop he came home and the socks looked like he had just put them on. They hadn’t stretched out. Also, his feet weren’t sweaty. I don’t understand what technology made that possible. Whatever it was worked. The thicker fabric will help with all that wear and tear too. When I put my fingers inside the sock and stretched I couldn’t see my finger through the stretched material.Definitely recommended.