The Jason Wu For Melissa Women's Trippy Ballet Flats in smoke lace are made from durable Melflex PVC and feature a pointed toe with an embellished rhinestone adornment a low cut vamp and a flexible sole. With a slip on style they have a canvas and rubber insole to wick away moisture and also feature the signature Melissa bubblegum scent. - L.M. Upper/Sole: Melflex PVC. Lining: 50% Rubber 50% Textile.