The upholstered foam cushion is removable with Velcro fastening. From the 1730s-1740s, wide heels with an upturned toe and a buckle fastening became popular. Conventions on fastening the buttons on a collar differ globally. Housings to accommodate the fastening system are welded to the upper surface of the tie. Latching on refers to the baby fastening onto the nipple to breastfeeding. Attaching the "horo" generally involved a combination of fastening cords and possibly a staff. The garment was clasped front to back by fastening brooches at the shoulders. Welding gradually replaced riveting and bolting as a means of fastening rolled armor plate together. This is a single-hole punch which also crimps a metal fastening loop around the hole. The outward bent staples are easier to remove and are for temporary fastening or "pinning". The lap belts however, still required manual fastening. The newest products for fastening vinyl in marine applications are Tenara thread and Monel staples. Another type of shell fastening is simply a large-diameter fine thread. Tying is another technique of fastening the three layers together. The methods of fastening the frame members also differ.