Koala Mattress in a Box King Single Memory Foam Mattress

Koala's original Mattress in a Box scaled down to king single size is a practical choice for teenagers, single professionals or a second bedroom that occasionally hosts guests. It uses the same core memory foam construction as the queen and king versions, with a graphite-infused layer to help offset heat build-up and a supportive base foam beneath. The medium-firm feel suits a range of sleep positions without leaning too far into either plush or firm territory. Because it's a single-sleeper size, edge support and motion isolation matter less, but the mattress still holds up well to regular use over years. Delivered compressed in a compact box that's easy to manoeuvre through narrow apartment hallways and up stairs, expanding to full size within about 24 hours of unwrapping.