The hottest trend in casual footwear for kids! ; Crocs will keep your child's feet cool and comfortable. Circulation nubs on footbed stimulate blood flow. Footbed conforms to foot creating a custom fit. Advanced toe-box ventilation system. Treaded outsole for traction. Crocs states these shoes should fit very loosely. The sides of your foot should not really touch the sides of the shoe. Your toes should never make contact with the front of the shoe. Once you have centered your foot on the foot-bed: You should have about a 1/4 to 1/2 inch of space in front of your toes, behind your heel and when you lift the strap you should be able to comfortably get your finger between the strap and heel. No leather materials used in construction. Measurements: ; Weight: 3 oz ; Product measurements were taken using size 1 Little Kid, width M. Please note that measurements may vary by size.