Learn More. ALLSAINTS Sid Shoulder Backpack in Black In good used condition - no major marks It's a 2-1 purse that has hooks on each end of the bag to be converted into a crossbody / shoulder bag but the strap is not included. Only can be used as backpack as is. - 100% Leather exterior with 100% cotton fabric lining - Flap top with magnetic snap and notch strap closure - Two interior compartments - Interior zip pockets - Silver tone stud accents - Measures approx 10.5" W x 11" H x 4.5" D