Twin Memory Foam Mattress Medium Firm Night Trial 180Wake up refreshed on a twin memory foam mattress that hugs your body while supporting your spine all night long. The Siena twin memory foam mattress blends adaptive comfort with dependable durability, delivering a balanced, medium firm feel at a great value. Engineered with four foam layers, including a responsive 1. 5" memory foam layer, Siena adapts to your shape and movement to relieve pressure points without sacrificing support. Four layer comfort