The Car Seat Footrest, KneeGuardKids, is necessary for children who: <br> 1. Kick the front seat<br>2. Sit cross-legged<br>3. Put their legs on the armrest<br>4. Cry and throw a tantrum<br>5. Say their legs are hurt<br><br> Kids siting crossed legs on the car seat or putting their feet on the armrest or the front seat. <br> It is because the gravity pulls down their legs as much as their weight. <br> Continuous stress to kids may cause knee pain and deformation. <br>And damage in their knees where the growth plate is densely locates may disrupt normal growth. <br> Kids kicking the seat back of the front seat. <br> It is because dangling legs may cause blood circulation problem and leg numbness. <br> So, kids kick the seat back to reduce the knee pain when longer cat trip. <br> KneeGuardKids protects child's knees health from the gravity, and help them to sit on the car seat comfortably and stably. <br>The longer you use the KneeGuardKids, the more value it has. <br><br> If you search KneeGuardKids on Youtube, you can watch the introductory and broadcast video. <br><br> Passed Federal Motor Vehicle Safety Standard No.213 "Child Restraint System" <br>by National Highway Traffic Safety Administration.<br><br> This product is strictly protected by patent, design patent and trademark. <br> US Patent Registration number is 9089219.<br> US Design Patent Application number is 29577301 and 29585089.<br> US Trademark Registration number is 4789479. <br>