Polyester ALL-IN-ONE-BOX SOLUTION: This infant car seat and stroller combo includes the Willow S rear facing car seat (4-30 lbs), the Alpine base, and the Brook+ modular stroller (up to 50 lbs), plus a SafeWash stroller seat insert, a parent tray, and a child snack tray 4 WAYS TO RIDE: This car seat and stroller combo adapts to your needs with parent-facing infant car seat mode, forward-facing infant car seat mode, parent-facing toddler mode, and forward-facing toddler mode FAST, SECURE, & PARENT-FRIENDLY INSTALLATION: The Willow S infant car seat features ClickTight technology, so you know it can be installed securely in your vehicle on the first ride and beyond PREMIUM FASHION: The Raven Black fashion features sleek & stylish black fabric with extra-plush infant car seat inserts, peek-a-boo windows on the car seat and stroller canopies, and a secure storage pocket inside the stroller basket ULTRA-PORTABLE, ONE-STEP FAST FOLD: The infant car seat is lightweight and easy to carry, and the Brook+ toddler and baby stroller features a lightweight, durable frame with all-wheel suspension and no-flat tires; plus, the stroller closes compactly in one step NATRUALLY FLAME-RETARDANT SAFEWASH FABRICS: The infant car seat cover and stroller insert are safe to machine wash and dry for quick and easy cleanup, and they’re naturally flame-retardant with no added FR chemicals TRUSTED BRITAX SAFETY: The ReboundReduce stability bar on the Alpine base helps minimize movement in a crash, and the carry seat carry handle also helps provide stability when used in the upright position. The car seat is side-impact tested according to FMVSS 213a; it is also tested to FMVSS 213 frontal impact standards CUSTOMIZE TO BABY’S SIZE: The RightSize system on the Willow S baby car seat provides adjustment points at the hips, shoulders, and between the legs to help you find the perfect fit for your child from the start CRUISE IN ANY WEATHER: The infant car seat and baby / toddler stroller both include a UPF 50+ canopy with a flip-down visor; the stroller canopy is also water-resistant to help keep your little one dry ACCESSORIES INCLUDED: With two cup holders and an upright phone holder, the parent tray makes it easy to keep all your essentials within reach; the child snack tray swings out of the way for easy loading and locks into place when you’re ready to stroll