I wear size 10 Nikes and ordered large in these. Out the box, they feel a little too snug and I am not sure if they will stretch or shrink after some wear. I definitely won't be putting them in the dryer though.
I am not sure when these will drop again but if you are a size 10, I would definitely go with XL instead of L.
ThemistoclesI wear size 10 on Salomon. Fitsock Size L seemed to me snog too and I ordered/received/tested XL. I feel fine in both sizes, but decide to use size L for sports/perfect fit and size XL for everyday to have more comfort.
I am not sure when these will drop again but if you are a size 10, I would definitely go with XL instead of L.