I needed to find another temporary mattress to replace my son's air mattress that leaked. He's epileptic and has become very chronically sensitive to VOC. I bought a new air mattress and in the shirt time it took to inflate, it almost gave him a seizure. Next we tried a CordaRoy that converts to a mattress. They claim to be low toxicity, but again there was a strong chemical odor.This cotton pad is stuffed with natural fiber that comes from the kapok tree. There was only a slight odor but it didn't cause any reaction. It sure if the odor is from kapok fiber or fabric dye, but in any case it aired away quickly and hasn't caused any reactions.If you're buying it to sleep on, it's comfortable enough if you're comfortable lying on very firm surfaces. It does provide enough cushioning for a light, slender person to not get painful pressure points. It would be similar to using a thick sleeping bag on the floor, but more supportive. If you need more cushioning than that, I recommend using a mattress topper under it.Note that the sizes are not standard bed sizes. The Large size is closest to twin, but a few inches wider and longer.