What is the weight limit for the foundation? February 21, 2018 15:47 Updated 500 lbs is the combined body weight limit on the Queen and King sizes, and 250 lbs is the limit for the Twin and Full. Related articles Can I use my current boxspring or foundation under a Yogabed™? What makes Marpac sheets special? How much does Yogabed™ weigh? Does Yogabed™ resist dust mites?