Bobi Cotton Lycra Pants in Black. - size S (also in XS) Bobi Cotton Lycra Pants in Black. - size S (also in XS) 96% cotton 4% spandex. Elasticized waist. Stretch fit. BOBI-WP87. B 07950. Bobi is an LA-based line of dresses and tees made from some of the highest quality jersey at an affordable price.