Newgrange mattress, with cool crystal fillings, is our best yet. Researched, developed & designed in Ireland, its formula works with your body’s natural temperatuture, so that you don’t get too hot or too cold at night. also famous pocket springs this mattress is finished with a box top, Inside fillings responds to your bodys temperature to absorb excess heat when you are too hot or releases stored heat when you are too cold – to keep you at a comfortable temperature to get your maximus nights sleep