This was soon improved to become a three-bolt helmet supported by a corselet (1867). Their thick vulcanized rubber collar is clamped to the corselet making the joint waterproof. Most bonnets are joined to the corselet by 1/8th turn interrupted thread. There is a small corselet of small scales around the pectoral region of the body. Spacefleet spacesuits had a corselet plate like on Siebe Gorman standard diving suits. At Medinet Habu the corselet appears similar to that worn by the Philistines. The original merry widow was a corselet incorporating slim panels of black, elastic yarn netting. As an undergarment, a corselet can be open-style (with suspenders attached) or panty style.