Vans Off The Wall Trek unisex off-white slip-on Drainage holes Shoe. These shoes are marked size 5. Based on fit and size comparison I believe that they are a men's 5, Women's 6.5 (Although they are not marked women's 6.5) Vans | Slip On TRK Shoes | Marshmallow/Flatspot. From the manufacturer: Vans Slip-On TRK Shoes Yucca in Marshmallow. Designed in collaboration with Yucca Fins and styled as a fully rinsable revision of their iconic skate shoe, the Vans Slip-On TRK is a lightweight silhouette crafted from over 90% synthetic materials. With a single-piece injected rubber construction, these low collar slip-on shoes feature deconstructed checkerboard drainage holes, an oversized reverse Waffle sole and a built-in tongue for additional protective coverage. Finished with contrasting blue piped taping, these marshmallow white Vans TRK shoes feature a protected toe bumper overlay and classic ‘Off The Wall’ rubberised heel scabs.