TWENTY Montreal Mackay Rib Bike Short in Black. - size XS (also in L) TWENTY Montreal Mackay Rib Bike Short in Black. - size XS (also in L) 92% viscose 8% spandex. Made in Canada. Machine wash. Light ribbed jersey fabric. Item not sold as a set. Shorts measure approx 15.5 in length. TMON-WF4. RQ6P-055. Twenty has transformed a fashion essential by giving the classic knit tee a luxurious and modern take. Crafted from amazing fabric, twenty creates super soft tees, knit dresses, bodycon skirts, and cozy sweatpants that will quickly become everyday staples in your wardrobe.