The mattress (like all bed from Zinus now) is fiberglass-free ... with only four (twin, full, queen, and king) available direct from the brand. There are twin XL and Cal king options listed ...

The Zinus Green Tea Memory Foam mattress arrived vacuum packed in a box, similar to how most bed in a box mattresses ... £286 for a king and £394 for a double. If you’re based in the US ...