Helix Midnight Luxe Hybrid Tencel cover, memory foams, pocketed coils CertiPur-US, GreenGuard Gold Twin, twin XL, full, queen, king, California king, short queen, RV king Medium GlacioTex cooling cover, GlacioTex cooling cover with CoolForce Layer, ErgoAlign Contour Layer Free for customers in the contiguous US Delivered in six to 10 days in a box; setup handled by customer 120 nights; 30-day break-in period required before initiating return Limited lifetime Yes Leesa Sapira Chill Hybrid Phase change cooling cover, cooling memory foams, pocketed coils CertiPur-US, GreenGuard Gold Twin, twin XL, full, queen, king, California king Plush, medium firm, firm N/A Free for customers in the contiguous US Arrives in a box in three to seven business days; white glove delivery available within…