BEIS The Backpack in Grey. BEIS The Backpack in Grey. Cotton and polyester exterior with plyester lining. Made in China. Top zipper closure. One main compartment with padded laptop pocket (15). Front zipper pocket and two side slip pockets. Adjustable shoulder straps. Trolley pass-through sleeve. Measures approx 13W x 19H x 5.5D. BEIS-WY280. BEIS323458. After countless trips and Shaycations, Shay Mitchell realized that she wanted to create amazing, affordable pieces for travelers like herself who are inspired to seek new places, meet new people, and share the world. BIS - pronounced base - began with the promise to give everyone the opportunity to pack up their stuff and hit the road with bags and accessories that wouldn't break the bank. From the gym to Jaipur, BIS will never compromise on functionality or looking selfie-ready cool.