Satin Pajamas

pajamas
A suit of loose pants and jacket or shirt for sleeping in
A pair of loose pants tied by a drawstring around the waist, worn by both sexes in some Asian countries
(pajama) (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
(pajama) a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
Pajamas, also spelled pyjamas (see also spelling differences) can refer to several related types of clothing. The original paijama are loose, lightweight trousers fitted with drawstring waistbands and worn in South and West Asia by both sexes.

satin
Smooth like satin
A cloth woven from silk, nylon or polyester with a glossy surface and a dull back. (The same weaving technique applied to cotton produces cloth termed sateen); Smooth and shiny, glossy. Particularly describing a type of paint
a smooth fabric of silk or rayon; has a glossy face and a dull back
Satin is a weave that typically has a glossy surface and a dull back. It is a warp-dominated weaving technique that forms a minimum number of interlacings in a fabric. Some definitions insist that the fabric is made from silk.