It's likely that your mattress is still the one you brought with you to move out of your parent's home. If it has been with you for more than a year, or if it was moved with you multiple times, it is time to replace it. No matter how big your bed is or whether you only sleep on one side of it, your mattress should be replaced every few years.
Experts recommend that you replace your mattress every 7-10 years. Old mattresses pose several dangers, including uneven support, dust mites, and allergen accumulation. You can also buy a swag cushion as a replacement mattress.
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There are many materials that can be used to make mattresses, including wool, latex, cotton, and foam. Manufacturers may use several materials to provide additional support and comfort. It is important that you ask about the material used in making a mattress before purchasing it. Your mattress's "feel" will depend on how the materials have been layered and sewn together.
When shopping for a mattress, there are many things you should consider. You can also compare the features of different mattresses. Are you looking for a mattress with a lot of support? Or something softer and bouncier. There are mattresses that have been certified as allergen-free.
You will find so many innovations in the design and technology of mattresses that it is worth doing some research to see what's out there.