Sizing: Small/Medium fits Women's shoe sizes 7 to 10.5 & Men's shoe sizes 5 to 9. The perfect, fast solution to relieve common plantar fascia, foot and arch pain, and discomfort. The full foot sized gel pack offers relief for heel pain, plantar fasciitis, forefoot, and toe discomfort. Our patent pending strap allows you to easily customize the amount of arch support and fascia relief that you require. Commonly used for discomfort from overuse, chronic problems like arthritis, inflammation, or very high and low arch foot types. Helps relieve arthritis pain, acute or chronic pain, muscle aches, inflammation, or swelling. Easy to put on, chill, or heat as you prefer. Starts working as soon as you put it on.