Find your perfect fit in the Sof Sole Fit Series High Arch Insole! Sold as a one-pair pack. Slip-on construction. Textile upper and lining throughout. 3.3 cm arch height. Find your perfect fit in the Sof Sole Fit Series High Arch Insole! Sold as a one-pair pack. Slip-on construction. Textile upper and lining throughout. 3.3 cm arch height. 55 Durometer foam in heel and arch. 40 Durometer foam in forefoot Anatomical nylon plate for foot alignment.