open thong
A tiny, crotchless thong which frames pussy in a window between thin bands of lacy material. Some types have a fine thread of pearls running from the top of the 'window' between the girl's pussylips. This thread connects to the waist band at the base of the spine. Another type has a feather attached to stimulate the clitoris. Open thongs are often decorated with semi-precious jewels, pearls, diamante, lace or sequins.
Her idea of heaven was to be knickerless, to strut her stuff wearing just an open thong under her tight red miniskirt. It was a sure-fire way of getting cocks and sperm.