Handmade from repurposed billboard vinyl, the debut line of Pet Hypothesis jewelry follows in the tradition of Freitag and other creative re-users by reinventing industrial materials as accessories. Designer Chelsa Robinson (also formerly ReadyMade's product manager) layers sterling silver chains over bits of colored vinyl that she sews with contrasting thread. We chose to feature Geopanic for its confetti-like abstraction of CMYK colors with red stitching, but you can see all her designs here. All pairs cost $75 and, true to the cause, $5 from every sale goes to the environmental organization, Conservation International.