Jansport Stranger Things Sierra Madre Reversible Backpack. We dug into our 1986 archives to re-release this reversible Stranger Things Sierra Madre that’s hiding a darker side. Flip Eleven’s personal pack inside out before going back to the Upside Down. Its roomy main compartment and wide front pocket are accessible either way you rock it. Features: Reversible. One large main compartment. Front pocket accessible from both sides. Dimensions: 15 x 13 x 5.5 in / 38 x 33 x 14 cm. Imported.