Designed to take the pressure off the plantar fascia, reducing pain and allowing it to heal naturally Targeted arch support distributes pressure more evenly and stabilizes the bones within the foot Deep heel cup prevents over-pronation and supination - the leading cause of many common injuries such as plantar fasciitis and Achillies tendonitis Forefoot perforations increase air flow for enhanced breathability Trim-To-Fit sizing fits most shoe types and foot sizes FSA HSA Eligible Item - The Spenco Plantar Fascia Insoles are eligible for purchase with Flexible Spending Accounts (FSAs) and Health Savings Accounts (HSAs).