Rainbow T-shirts and sweatshirts were extremely popular in the early part of the 1980s, and this black rainbow sweatshirt for women looks very authentic, and features a loose fit. It can be bought also in white and blue from Perfurm on Amazon in a choice of sizes from Small to 5X-Large. Also ideal for gay pride celebrations. Add some leggings to complete your look.
You can find images of original vintage rainbow tops from 1980 and 1981 on Pinterest.