APMA approved Ortholite memory foam Hook-and-loop closure with elastic laces Textile lining Wipe clean Fit hint: These sneakers are designed to hug the foot in them, so they tend to run small. We recommend ordering up a ½ size larger for a better fit. SRTech provides a sturdier structure and tread design for independent walkers. Designed with sensory pods, on the move toddlers will be able to feel the ground beneath for better traction and grip.