Double layered long sleeve top by comme des garcons (from spring / summer 1990). Made from a stretchy nylon knit fabric, with purple outer layer and blue inner layer. It has a buttoned front, round neck, and batwing sleeves. The fabric can be manipulated to show different amounts of the blue inner layer while the singlet is worn (see pictures for examples).

We also have a and from the same collection.

No marked size (womens/unisex), approx AU womens S-XS
Check measurements to confirm fit
All measurements taken flat

Shoulder width (approx, one piece sleeve): 36 cm

Width (approx, no underarm point): 42 cm
Length (neck to hem): 44 cm
Sleeve length (approx, one piece sleeve): 60 cm
Hem width: 29 cm

100% nylon
Made in japan
SS1990