Folding cushions always take me back to the days of basement sleepovers. I think my mom still keeps a few of them on hand for times when overnight visitors bring their kids. However teenage they might seem, folding mats and their close cousins, sleeper ottomans, can be great for small apartment dwellers who need to make room for sleepover guests.

1. Transformable Chair from Casamia at Orange Skin (price on request): This modern design stacks cushions in different fabrics and belts them together into a seat/bed. It's an expensive design, but also a DIYable idea.
2. Trix Transformable Furniture at Hive Modern ($1,300): Manufactured by Kartell, the Trix is a similar design that's a little smaller and more streamlined.
3. Bo Concept Ottoman Sleeper (starting at $350): This piece folds from a square ottoman into a twin bed. You can also order custom fabric covers for the ottoman.
4. Deluxe Flip Pad from Foam Furniture ($150): This is a classic tri-fold mattress pad with the added feature of a built-in pillow.
5. PB Teen Seat to Sleep (on sale for $350 - $400): This loungy chair has a hinged frame that allows it to fold up into a seat or stretch out into a bed.
6. Folding Guest Bed from Sleep Warehouse (starting at $189): Here's another basic tri-fold design. You can find Hide-A-Mat portable beds at lots of big box stores, including K-Mart, Walmart, and Amazon. They're not the prettiest, but they're fairly comfortable and anyone with basic sewing skills could easily make a slipcover for the stacked/folded rectangle.
7. Custom Folding Mats from FoamOrder.com (starting at $100): This online store allows you to choose the thickness and size of your folding foam mat.
8. Cojines Floor Pillows at Stardust ($330): These cushions are connected by magnets so that you can stack them, use them as floor pillows, or string them together into a bed.
9. Pling Collection's Zip Zip (price on request): This is a similar idea, but instead of magnets, these cushions use zippers as connectors.
10. Pottery Barn Multi-stripe Outdoor Folding Mat (on sale for $99): In the right home, this folding cushion could look very 60s modern. It's covered in outdoor fabric, so it can be used inside or on a deck.