Singlet by wrinqle, the in-house brand of inoue pleats co. Made from a pleated polyester fabric with blue, red, and white horizontal stripe. A matching shirt in the same fabric is available here (the two are seperates, but could be worn as an ensemble - see pictures 9-10).

Size M - L (JP womens), may fit smaller
Check measurements to confirm fit
All measurements taken flat
Garment has stretch

Shoulder width: 22 cm
Width (at underarms): 27 - 48 cm
Length (neck to hem): 53 cm
Hem width: 27 cm

100% polyester
Made in china

More wrinqle items here. Or read (a little) about inoue pleats co.