The Serta I series is a Hybrid I Comfort with the premium gel foam but also has individually wrapped springs. This is part of the newly engineered Serta Mattresses that have become the best selling sleep product in the U.S.A. You litterally have to lie down on it to be convinced. You are invited to visit our stores in Minocqua or Antigo and discover true comfort by your own trial. We guarantee that you will not be pressured to buy or hurried in any way. We are looking forward to your visit.