Treat tired aching feet to the tri arch support full length insolesr features 3 interchangeable arch supports with gel heel padsr sizes 25 55 6 85 and 9 115 r gradually build up the height of insoles to improve your conditionr ideal for improving flat feet fallen arches or pronationr can be used to treat plantar fasciitisr arch supports can be removed from insole with simple click onoff functionr can help to re align the body and correct posture step by step