Using these seat belt pads is super easy. Just slide them onto the seat belt. They're designed to fit smoothly and stay in place. When it comes to maintenance, always remember to wash them by hand. The water shouldn't be hotter than 40℃ because high temperatures might damage the material. Also, don't use bleach as it can cause the colors to fade. After washing, lay the pads flat to dry. Keep in mind that these pads are made for your child's comfort and safety, so make sure they're properly attached to the seat belt before each journey.