Booster seat manufacturers are required by federal law to clearly state the lower and upper weight limits for each seat. (thespruce.com)
However, I've noticed that many babies start wetting their pants more easily when they are getting close to the stated upper weight limit. (easybabylife.com)
Advertised as suitable for riders of «almost all sizes» (elsewhere the product information states a 220 - lb upper weight limit), it can be modified into a standing scooter by removing the seat. (tinyfry.com)