Bobi Modal Spandex Rib Tee in Black. - size S (also in XS) Bobi Modal Spandex Rib Tee in Black. - size S (also in XS) 54% cotton, 44% modal, 2% spandex. Rib knit fabric. Ruched sides with adjustable drawstrings. Imported. BOBI-WS2155. 539 61403. Bobi is an LA-based line of dresses and tees made from some of the highest quality jersey at an affordable price.