Rebecca Minkoff Always On Mab Backpack in Black. Rebecca Minkoff Always On Mab Backpack in Black. Nylon exterior with jacquard fabric lining. Zip around closure. Adjustable shoulder straps. Exterior snap button and zip pockets. Interior slit and zip pockets. Interior laptop slot. Dog leash clasp and stud accents. Measures approx 13 W x 17 H x 4.5 D. RMIN-WY1004. HF16INYB33. Classic, stylish, and functional; it's easy to see why we love Rebecca Minkoff.