Boys Satin Pajamas

pajamas
(pajama) a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
A suit of loose pants and jacket or shirt for sleeping in
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.
(pajama) (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
A pair of loose pants tied by a drawstring around the waist, worn by both sexes in some Asian countries

satin
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.
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

boys
A male child or young man
A son
(boy) son: a male human offspring; "their son became a famous judge"; "his boy is taller than he is"
A male child or young man who does a specified job
(boy) male child: a youthful male person; "the baby was a boy"; "she made the boy brush his teeth every night"; "most soldiers are only boys in uniform"
(boy) a friendly informal reference to a grown man; "he likes to play golf with the boys"