The design focuses on saving weight to reduce fuel ... Known as "SoFab," the airline business-class seat uses a convertible sofa bed in lieu of a fully lie-flat reclining seat.

There's no need for a guest room when you have a sofa bed. Shop these under $500 from Wayfair, Urban Outfitters, Amazon and more. Your overnight guest will feel snug as a bug on this simple ...

This bedroom is open but separated from the living area by a piece of furniture. The space also features a particularly ingenious pull-out bed ... some pretty specific ideas about materials ...