These 4" or the traditional 8" thick foundations are made from cabinet grade,untreated spruce wood. There is an airspace of 2" to 2.5 inches inbetween each slat. We also use organic cotton flannel ticking made in South Carolina, certified organic to the Global Organic Textile Standard (GOTS), in our new improved diamond pattern covering. The inside of the cotton flannel ticking has a layer of wool, which is a Blend of GOTS-certified organic wool and Pure Pacific Northwest Oregon/California Eco Wool®.

These 4" foundations help put the mattress closer to the floor.This is good for babies going from the crib to a twin. The 8" foundations put you up higher.Wood foundations allows the mattress to breath easily, and also work the same way as a platform wood bed with slats.

The Organic Mattress Store foundations come in 2 depths. 4", and 8". The 4" is designed for bunk beds, but can be used on any metal or wood bed frame.The 4" puts the bed lower to the ground.The 8" is standard. If you already have a platform bed,a futon frame, or a bunk bed you may not need a foundation at all.Remember to measure from the bottom of your bed frame up the headboard, to see how much foundation you will need, without allowing a gap in the headboard for your pillows to go thru.