Our shades strap and ear adjuster kit comes with two options to get the perfect fit for your child’s sunglasses! The head strap and ear adjusters are both made with a comfy, stretchy, light, and easily detachable food grade clear silicone material that is perfect for baby, toddler and junior size sunglasses and glasses frames. TO USE HEAD STRAP: The head strap will help keep sunglasses and prescription glasses on your child’s face to prevent losing them or sliding off during playtime. The strap has hollow tips on each end, which slide right onto the end of the sunglasses arm pieces. And will tuck right behind your child’s ears, and not bother them while wearing the head strap. TO USE EAR ADJUSTERS: Our kids' ear adjuster pieces help create a better fit on infants or toddlers growing into a larger size. These baby sunglasses straps help tighten up the fit of the sunglasses arms, and are also made of a clear silicone material that is soft and flexible for baby’s ears. The ear adjuster piece slides up the arm of the sunglasses on each side. It should tuck behind your child’s ear, if the arm is too long and the glasses are sliding off their face.