Baby On Board! The Lazer BOB bike helmet helps protect your little ones even if they only ride along in the baby seat. A neck reinforcement adds protection and 360° reflection enhances visibility. This introductory toddler helmet is child-seat ready Comfit3 retention system is easy to adjust and provides the perfect fit Thick comfortable padding 6 vents help keep the interior cool Head Circumference: 18.1-20.5 360° reflection increases visibility in low light CPSC certified Weight: 9.5 oz / 270 g Imported.