serta vanguard stonehaven eurotop firm twin xl mattressThe Serta Vanguard Stonehaven is built for strong, steady comfort with a firm feel you can trust. This updated design uses better coils and five support zones to help your body rest the right way. A blend of supportive and cosy foams, including PillowSoft gel foam, durable HD gel memory foam, and firm targeted gel foam, works together to cradle your body and soothe tired muscles. Enjoy a fresh, cool sleep environment with anti microbial fibre and a