| Twin XL 15" Hybrid Mattress - Alwyn Home Glynis Two-Sided Plush Mattress, Fiberglass | 80 H x 39 W 1... This flippable, natural, organic mattress is twice as nice. GREENGUARD gold-certified, this hybrid mattress is constructed using up to 1, 089 pocketed support coils with side support. The flippable, all-natural construction eliminates the ... more | Wayfair | $1,569.99 $1,429.99 FREE shipping go to store |