Investing in a new mattress requires research, patience, and testing. Some may find it useful to test out mattresses in a store, even if buying online later. If you have that option, here are recommendations from the simmons for testing a new mattress in the store, following the S.L.E.E.P method:
S: Select a mattress
L: Lie down in your typical sleep position
E: Evaluate the level of comfort and support
E: Educate yourself about each selection
P: Partners should test beds together