This gray Japanese floor mattress fills a queen footprint at 80 x 60 x 3.5 inches, giving couples or larger guests the extra thickness of the 3.5 inch build for a softer landing than a standard floor mat. The nine-layer core pairs egg-crate foam with 25D memory foam to spread body weight and ease pressure on the spine, whether it's your everyday futon mattress, a spare bed on the floor, or a cushioned surface for yoga. The brushed fabric cover is gentle on skin, breathes well overnight, and is reinforced at the edges so the shape holds up through regular folding. At about 14.1 lbs it's still a one-person job to roll up, tie off with the included straps, and zip into the storage bag for a closet, RV, or road trip. Expect roughly 72+ hours after unboxing for full expansion, and stick to damp-cloth spot cleaning and sun airing to keep it in shape.