Herschel Supply Co. Heritage in Blue. Herschel Supply Co. Heritage in Blue. Poly exterior with printed poly lining. Two-way zip around closure. Adjustable shoulder straps. Exterior zip pocket. interior slot. Leather trim. Measures approx 12 W x 18 H x 5 D. HERS-UY356. 10007 00918. Herschel supplies backpacks and bags that are modern in shape with loads of crafted detail. Inspired by the old-school American mountaineering heritage and world travel, their collection is a new twist on all your vintage favorites.