A memory foam mattress makes a great alternative to the standard spring mattress. Made of foam that shapes itself to your body and supports you where you need it most, a memory foam mattress is ideal for relieving back problems. You can also find foam mattress toppers for your spring bed.
Memory foam also makes a great camping mattress. Lightweight and compressible, the foam 'remembers' its former shape and expands to full-size comfort after being stored in your pack.