Corrections: Have an update or correction to our information about Beautyrest BR800 Medium? The BR-800 12 Medium Firm Mattress by Beautyrest provides flexible support where needed, isolates motion and offers … We rate this a 6 on our 1-10 comfort scale with 10 being firmest. I give this mattress … The Beautyrest BR800 Medium is an awesome mattress set. Beautyrest BR800 Medium Twin Mattress - 700810003-1010. Twin Beautyrest BR800 Medium Mattress The Beautyrest BR800 Medium Mattress offers a firm with the latest innovations in bed technology from Simmons. Features: DualCool™ Technology DualCool™ Technology is an antimicrobial performance layer that works to keep your mattress fresh … The DualCool technology is an antimicrobial performance layer that works to keep your mattress … I highly recommend this mattress set. I was in need of a great mattress set to help with my back. I suffer from back problems. Shop Beautyrest BR800 12 Medium Firm Mattress - Twin online at Macys.com. The BR800 Medium is a tight top spring core medium mattress model released in 2019 that is part of the Beautyrest product line manufactured by Simmons.