Satin Pajama Pant

pajama
a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
(usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
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
a smooth fabric of silk or rayon; has a glossy face and a dull back
Smooth like satin
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.
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

pant
A short, quick breath
the noise made by a short puff of steam (as from an engine)
trouser: (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately; "he had a sharp crease in his trousers"
A throb or heave of a person's heart or chest
breathe noisily, as when one is exhausted; "The runners reached the finish line, panting heavily"