Toddler Slip-On Sandals. Very durable, checkerboard drainage holes for breathability, and an oversized reverse waffle sole for incredible traction in any situation. Designed to be lightweight and fully rinseable, the Toddler Slip-On TRK is easy to pack for your next adventure, so you can slip-on and on and on… BIG-TIME TRACTION - Improved traction for any situation, thanks to the oversized reverse waffle sole.