Twin XL Side Sleeper Beautyrest® Quintessence™ Grey All Mattresses

Twin XL mattresses measure 39" × 80" — as wide as a twin but five inches longer, giving taller teens and adults room to stretch out. They're the standard size for college dorms, work great on adjustable bases, and pair up to build a split-king setup. Compare every twin XL option below by brand, feel, and price.
Side sleepers need a mattress that cushions the shoulders and hips while keeping the spine aligned — usually a plush to medium feel with strong pressure relief and contouring. The options below help side sleepers avoid shoulder and hip pain. Compare them by brand, feel, and profile.
Indulge in exceptional sleep with Beautyrest® Quintessence™ mattresses, meticulously crafted for luxurious comfort, precise support, and innovative cooling technologies. Discover unparalleled sleep refinement.

Shop 200+ mattresses from Serta, Beautyrest, Sealy, Tempur-Pedic, Springwall, and Stearns & Foster at National Mattress — available in Single/Twin through King sizes from $99 to $6,640. Choose from innerspring, euro-top, memory foam, hybrid, and latex constructions in four firmness levels from extra firm to plush. Every mattress is manufactured in Canadian factories using CertiPUR-US® certified foams and ships free across Canada with a 365-night sleep trial, price match guarantee, and manufacturer warranty coverage up to 25 years.

Twin XL Side Sleeper Beautyrest® Quintessence™ Grey All Mattresses
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  • BEAUTYREST® Quintessence™ 15" Plush Pillow Top Mattress - Twin XL BEAUTYREST® Quintessence™ 15" Plush Pillow Top Mattress - Twin XL brand icon
    • Beautyrest® T3 Pocketed Coil Technology
    • WinterCool™ Tri-Fiber with alpaca, cashmere, and silk.
    • WinterCool™ Sleep System with 4 distinct cooling technologies.
    • WinterCool™ Carbon Foam and GelTouch® Foam
    Twin XL $1,424
    Compare at $2,999
    Online availability icon In-Stock Only 7 left!
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    Free delivery availability icon Free delivery as soon as Tomorrow, Jun 4
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