The best replacement for foam is spring mattress.

The best alternatives to foam are rated as following:
★★★★★  spring mattress
★★★  fiberglass insulation
★★★  latex mattress
★★  cellulose insulation
★★  coil crib mattress
★  spring mattresses
★  memory foam
★  rubber pipe insulation
★  coil baby mattress
★  innerspring mattress
★  batt insulation
★  spring
★  inflatable sleeping pad
★  air sleeping pad
★  latex mattresses
★  tempurpedic
★  coil mattress
★  liquid soap
★  fiberglass
★  tempur pedic
  feather pillows
  innerspring
  latex
  froth
  innerspring crib mattress
  spring crib mattress
  gel mattress
  rubber underlay
  liquid rogaine
  closed cell foam
  caulk
  gel hand sanitizer
  microfiber pad
  fiberglass pipe insulation
  featherbed
  velcro rollers
  pillow top
  feather pillow
  latex foam
  spring cot mattress
  cellulose attic insulation
  sleep number
  cellulose
  memory foam mattress
  spring mattress ikea
  silicone ear plugs
  gel memory foam
  paper air filter
  spring mattress which is better
  regular insulation
  spring baby mattress
  gel
  liquid hand soap
  feather beds
  sponge
  pocket coil mattress
  coil
  gauze
  coil spring mattresses
  polyether foam

Your alternative for foam is not listed? Suggest!
Speaking about foam, one probably shouldn't forget about fiberglass.

Other search terms related to foam and their ratings are:
★★★★★ fiberglass
★★★★ urine
★★★ gel mattress
★★★ box spring
★★★ cover
★★★ foil insulation
★★ pillow top
★★ juicing
You have in mind a companion for foam and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of foam in all years. Click on graph for more.
foam
spring mattress
fiberglass insulation