The maximum weight recommendation for the Doona Infant Car Seat & Latch Base is 35 pounds. The minimum weight recommendation is 4 pounds. The product weight is 17.2 lbs. The materials used in the Doona Car Seat & Stroller include PA+GF, PP, Al, PU, EPS, and Polyester. The Doona Infant Insert is made with bamboo fabric and is anti-bacterial and hypoallergenic. There is no information on the ingredients of the Doona Car Seat & Stroller as it is not applicable.