The design fixes the heel over the flat sole for stability during lifting and squats; Rubber on the outside provides grip during lateral movements The high-quality honeycomb fabric and the durable covers on the back and sides ensure a comfortable fit Notches in the sole under the toes provide flexibility for push-ups, planks and agility drills; Grippy traction allows freedom of movement on different floors in the gym Notches in the sole under the toes provide flexibility for push-ups, planks and agility drills; Grippy traction allows freedom of movement on different floors in the gym #13,152 in Clothing, Shoes & Jewelry ( ) #18 in