UNIVERSAL: this child booster seat is simply attached to a chair using two straps (1 for the seat and 1 for the backrest). It has a 3-point harness for optimal safety; Backpack inside: 27cm x 19cm x 8cm + 10 CM: wherever you are, your child is comfortably elevated by 10 cm with the Yummy Travel booster seat. You use it both with friends and outdoors LARGE COMPARTMENTED POCKET: under the seat there is a large storage area. You can easily take the meal, the snack or any other things you need to feed your little one ULTRA COMPACT: once folded, the booster seat is very easy to transport. Your child wears it as a backpack, he loves it! EASY MAINTENANCE: remove the seat reinforcement and this booster seat can be machine washed at 30°. Practical!