The Pioneer Combination Harness-2-Booster Seat is an excellent choice for making travel with your growing child safe, comfortable and hassle-free. Our comprehensive SafeCell Impact Protection surrounds your child in safety components that work together to protect well beyond the established federal safety standards. And Complete Side Impact Protection PLUS provides an advanced layer of protection with a protective shell and an energy-absorbing foam headrest designed to keep your child's head and neck extra secure.