Helix Dawn vs Plank Firm: which firm mattress should you buy?
Type: HybridFirmness: FirmHeight: 11.5″Sizes: 8Sleep trial: 100 nightsWarranty: LifetimeSale price: from $1,099 at Helix Type: Memory foamFirmness: Firm, Extra FirmHeight: 10″Sizes: 14Sleep trial: 120 nightsWarranty: LifetimeSale price: from $561.75 at Plank It’s the battle of the firm mattresses, as we pit the Helix Dawn and Plank Firm against each other….