Mifold portable car seat. COMPACT AND NARROW BOOSTER SEAT - the world’s most compact and narrow, backless booster. Designed for kids, aged 4 and up, 40 to 100 lbs. and 40 to 59 inches tall, mifold is more than 10x smaller than a traditional booster, and just as safe PORTABLE BOOSTER SEAT IDEAL FOR TRAVEL – the mifold comfort booster fits into a child’s backpack, glove box or parent’s handbag, making it perfect for carpooling, as a travel booster, for ride sharing, three across and more