I bought this to use while traveling with my son but only ended up using it once. He was already close to no longer needing a booster. Designed for children aged 4 and up, 40 to 100 lbs, and 40 to 59 inches tall, mifold Comfort is ideal for everyday use and compact enough to take with on every adventure! mifold is the world’s most compact and portable backless booster seat. mifold is more than 10x smaller than a traditional booster and just as safe. mifold Comfort features the super comfortable, extra padded “Compact Comfort” seat cushion, anti-slip pads and an easy to fit shoulder guide. mifold Comfort is safety tested to FMVSS 213 in the US and is globally regulated which means it can be used in every country except Australia and Taiwan.