Oyster 4 & Aton B2 Travel System BundleThe Oyster 4 Stroller combined with the Aton B2 car seat and base ensures the baby is all set for travel and on the go. Designed for growing children, the Oyster 4 is suitable from birth to 22 kg and features a canopy and headrest that can be adjusted simultaneously to four height positions. The Award Winning Aton B2 i Size baby car seats Linear Side impact Protection, newborn inlay and height adjustable headrest help get your baby safely from A to B.