The Safety 1st Basic Booster Seat features a 3 point safety harness and two chair straps. One strap is used to secure the booster seat on the underside of the dining room chair, while the other has been added to fasten it to the backrest. Suitable for children from 6 months to 4 years. 3 level height adjustment. Chair straps included for added security. Rubber grippers on the underside of seat for better stability. Easy to clean design. For ages 6 months and over. Suitable for children up to 15kg. Minimal assembly. Manufacturers 2 year guarantee.