These silk stockings belonged to Queen Elizabeth and are embroidered at the top. The Queen was fond of embroidered stockings and shoes - preferably made of silk. This particular pair of stockings was a Christmas present to the Queen from Robert Dudley and was given to her during the first New Year's celebrations of her reign.
The boots (to the right) also belonged to Queen Elizabeth and was used by the Queen when she went hunting. The boots are made of leather and shows how thin her calves were.
The reason for why the corset is in such a good condition is that is was not worn by a living woman - instead it was used for the effigy of Elizabeth after her death; that is a statue-like likeness of the Queen that was dressed as she would have been dressed when she was alive. If she had worn it the corset would probably have been in a worse condition because it would have been exposed to sweat and movement through its use.