Wilt Slub Shrunken Tank in Black. - size XS (also in ) Wilt Slub Shrunken Tank in Black. - size XS (also in ) 100% cotton. Heathered jersey knit fabric. Shirttail hem. Intentional color and texture variation in fabric. WILT-WS549. 032313. Wilt offers a collection of basics that are colorful, soft, and casual. Their slub jersey tees, dresses, and tanks are a favorite with ladies that like to stay comfortable, but remain stylish.