I like the feel of this Pro-Air product, but unfortunately, these sheets do not fit at all. I purchased the split king Adapt Medium mattress. The fitted sheets with this set seem designed to fit a mattress with several more inches of depth, since it is very baggy with my Tempur-Pedic mattress. I have tucked the elastic under the bed as much as possible yet there is still way too much excess material. I was advised that these sheets would fit my bed. The term "fitted sheets" is totally wrong for these sheets. I was so unhappy with this product I would have returned it, but unfortunately, this is not allowed.