The boulevard click tight convertible car seat has the patented click tight installation system, an extra layer of side impact protection, click & safe snug harness indicator, and safe cell impact protection for peace of mind while you are on the go with your child. Car seat installation is easy as buckling a seat-belt thanks to the click tight installation system. In the boulevard car seat, you are surrounded in safety. This convertible car seat features the patented Britax safe cell impact protection system, which includes a steel frame, energy-absorbing base, v shaped tether to minimize seat rotation and staged release stitches that slow and reduce forward movement in the event of a crash. Britax designed the boulevard click tight car seat with 2 strong layers of side energy absorption; a deep foam lined shell and head protection will shield your child from side impacts. Plush foam padding and fabric, along with 7 recline positions ensures premium comfort for your child. The 14 position easy adjust harness grows along with your child and you can change the height of the seat with just the push of a button no re-threading necessary. Have peace of mind knowing your child's harness is within range of proper tightness. With the sound of a click thanks to the click & safe snug harness indicator, you will know it is correctly adjusted. The boulevard car seat can be used rear facing 5 40 pounds and forward facing 20 65 pounds, child standing height 49 inches or less. Car seat dimensions 23 x 18.5 x 23.5 inches (LxWxH). 14 position harness slot heights 8.35 inches to 19.4 inches. FAA approved. Seat area depth / width: 10.5 / 11.5 inches. Recommendation: the American academy of pediatrics recommends that all infants and toddlers should ride in a rear facing car seat until they are 2 years of age or until they reach the highest weight or height allowed by their car seat manufacturer. Britax strongly recommends that children ride rear facing to the highest weight or height specified.