The upside down is how eleven described an alternate dimension to the boys this is the place where will byers is trapped by the evil monster in stranger things a netflix original show this is not official merchandise it is an original design inspired by stranger things and should not be associated with official products ltbr gtltbr gtt shirt design reads the upside downltbr gtltbr gtour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrun