<!--ProdInc[600016283]/Mall:[potterybarnkids_US]--> The innovative Nuna AACE Booster Seat contains no added fire-retardant chemicals and breathable knit fabric for lasting comfort for even the longest of trips. Featuring three depth options for your baby’s growing legs, the 3-D growth system expands out and up, so it grows with your child. With armrests, customizable recline and side-impact protection (SIP) pods for added safety, this ultra-comfy seat is the best booster for car rides. DETAILS THAT MATTER * Re-think the way your child rides with a seat that grows just like they do. * With one-hand you can adjust the headrest height into nine positions. * Seat sports 3 depths giving growing legs plenty of support and space. * Energy absorbing foam and SIP pods take side impact security to the next level. * Belt positioner aids in correct shoulder belt routing and minimizes user error. * Ventilation panels within the shell and breathable (and washable!) knit fabric create a comfy climate for even the longest of trips. * From fabric to foam and beyond, each element is smartly sourced to be both flame resistant and contain no added fire retardant chemicals. * GREENGUARD Gold Certified to contribute to healthier indoor air, keeping you and your family safer. KEY PRODUCT POINTS * Shoulder system works simultaneously with the headrest, expanding out while your child grows up. * Converts from a high back to a no back booster. * Lower anchor connectors allow for 8 position recline in high back mode & easily secure car seat to vehicle seat during use or transport. * Easy to clean. * Child Usage Requirements (with high back booster): 40 to 110 lbs or 38'' to 60'', suggested age at least 4 years old. * Child U <img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=potterybarnkids&ProdInc=600016283&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px''>