The NextGen Active stretching sock can be worn at night or during the day when you are lounging around. The sock has been medically proven to help treat plantar fasciitis, achilles tendonitis, and muscle cramps. The sock is designed with a high quality material that is breathable, washable, durable, and comfortable to wear. The sock comes with an adjusting strap that allows for incremental increases in angle that allows you to choose your desired amount of dorsiflexion. The hook and and loop fasteners are made of a high quality material that keeps your foot at dorsiflexion while it is on and even throughout the night. The stretching sock is superior to other forms of night splints because it does not press against your leg causing discomfort from nerve compression.