These FORM Ultra-Thin Insoles are a full-length, semi-rigid orthotic arch support insole that is for all arch types. They feature an ultra-thin base layer that custom molds to your unique foot shape while still maintaining support. Their soft, comfortable high density foam for prolonged shock-absorbing comfort. The Comfort-shaped arch design provides ideal support reducing stress on feet and knees. Their heel cup is designed for optimal support while stabilizing and positioning the heel to absorb impact. The TemperWeave top layer fabric reduces moisture and odor causing bacteria. Perfect for all narrow-fitting athletic shoes, sneakers, casual shoes and boots.