These Canterbury Phoenix Genesis Team firm ground boots are for men and all sizes are in US Men's. They're great for backs and offer excellent traction on firm ground. To use, just put them on like you would any other boots and head out to the field. After each game or practice, make sure to put them in a place where they can dry out. This will help keep them in good shape. If you want to clean them, follow the tips in the Boot Care Guide. This will make your boots last longer, feel more comfortable to wear, and perform better on the field. Enjoy playing with your new boots!