This is very timely. Yesterday we discovered a large rip in our dd's mattress due to some slightly "exuberant" jumping as of late. That poor mattress has been peed on, drooled on, chewed and pounded on with little fists...I think it just finally gave up.
Goodnight Green has a new mattress by Nook called Pebble. It sounds like sleeping on a bed of fresh air...with eucalyptus fibers and textures and inner layers promoting oxygen flow. It's pricey but completely eco-friendly and if it soothes the savage I'll be first in line for it!