Many people aren't aware of this - but it is true. Simmons is another example:
"It may be of interest to know that mattress brands such as Sealy & Slumberland are operated as franchises, just like McDonalds. The parent companies license the name to local mattress manufacturers to use on product sold within that country and usually protects them from imports using the same name. Although they have to adhere to certain material and quality guidelines, they are allowed a lot of leeway to conform to different local needs.
Basically, customers here pay a huge premium for the name but don't expect a particular model of one of these brands sold in Thailand to match the same model/brand as one sold in the US or Europe."