These are the best socks alternative to those crazy expensive Trusox. I skate in quad skates for roller derby and use these so that my feet won't slip and get blisters when I skate. They work very well and are the most comfortable and breathable alternative I've tried on Amazon. It's not just a simple, thick cotton sock like some of the other ones. It feels very fitted, well-made, sturdy and like it will last a long time. The grips are both on the inside and outside and are VERY grippy. Like, I have to be careful the order I slide gear on my legs or it will catch on the Lux grip socks and pull the sock up. Highly recommend these for any sport or if you just have trouble with blisters in general.