When various layers are used, soles may consist of an insole, midsole, and an outsole. Insoles are usually made of cellulosic paper board or synthetic non woven insole board. Some may also have a removable insole, or orthotic, to provide extra arch support. If the toes overhang the insole, the toebox is too small. The Saran ventilating mesh insole was also used in the M-1945 tropical combat boot. It has no insole and little stitching. Imprints of a person's foot can be left on the insole (inside) of footwear. It will also include the orthotics as an insole on top of that. Frequently the thin insole is glued in place to reduce movement and weight. The clinched hobnail ends were covered by an insole. The insole is capable of counting steps taken and calculating calories burned. The insole connects to a smartphone via Bluetooth. The workmen complained to Insole that they had no confidence in these replacements. He also received sympathetic letters from Cowdrey, Insole, Griffith and Cobham. This was sold to J. H. Insole of Cymmer in 1862.