When did ballet pumps become trainers? Right now. Adidas' Adifom Megajane is where Y2K running tech meets a Mary-Jane. A clash of the ballet pump with a more ergonomic, technical shoe, it features a mesh upper, cushy FOM midsole, and easy hook-and-loop straps. Sporty, but made fashion. Mesh Upper Textile Lining Slip-On Hook & Loop Strap Reflective Details Textile Lining FOM Midsole Rubber Outsole