Go beyond one size fits all and find a luxury mattress that's made for your unique sleep preferences. The Helix Midnight Luxe is Helix's most popular premium mattress designed with a medium feel, specifically tailored for side sleepers, those who toss and turn at night, and is great for couples. The Midnight Luxe is widely recognized as one of the highest-reviewed mattresses across the internet and is considered a 56 on the firmness scale with 10 being the firmest.