CUSTOM ADJUSTABLE STRAP - Secured with a strong fastener strap, the night sock’s tension is easily adjustable to create the perfect amount of stretch for every individual. LOW PROFILE - Super soft and comfortable to wear all night long – won’t snag sheets and blankets. EASE YOUR PAIN - Offers an effective stretch of the calf muscle and soft tissues of foot and ankle to help ease your pain associated with common overuse injuries such as Plantar Fasciitis and Achilles Tendonitis. LIGHTWEIGHT DESIGN - Made from only the highest quality Ultra-soft, lightweight, moisture wicking material. Hand wash with mild soap in warm water. Rinse well and air dry. CUSTOM ADJUSTABLE STRAP - Secured with a strong fastener strap, the night sock’s tension is easily adjustable to create the perfect amount of stretch for every individual. The regular size fots those with a calf circumference of 16" and below. The large fots calves 16" - 21".