Mattresses with bunk beds should not be comfortable and hard. When you buy a frame, it is often equipped with two double sleeping areas. However, what comes with the kit is very slim and can make you very uncomfortable at night.
There are many ways to deal with this situation. The problem is, the original product is solid so it stays well framed. If you want to replace it, you need to use a sheet of plywood underneath for proper care. You can now get twin bunk beds for sale via https://www.thebeanbagstore.com/beds/bunk-beds/twin-bunk-beds.htm.
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Sometimes the main product that comes with the kit can be changed. Many furniture stores offer products at different levels of comfort at different prices. There's nothing wrong with asking a store manager or retailer if you could upgrade to a better product for a little extra cash. After all, you bought something from their store and most places want to keep customers happy to have them come back.
If you ask for the best product, they can even get paid, depending on the business's desire to keep your business. If you order products online or from a retailer, you may need to replace the bunk bed mattress with one that is more comfortable.
Top size duvet products are available, as well as for full, queen and king sizes. Since you bought two, you might want to see special offers for buy one, get half price, or something.