Queen Mattress GELBIY 10” Medium Soft Memory Foam Mattress in a Box. GELBIY mattress provide a breathable and moisture-absorbent surface to keep you cool throughout the night. The GELBIY queen size mattress provides a comfortable night s sleep for all adult and teen sleepers. In addition GELBIY mattresses take quality control very seriously and each material is tested thousands of times to ensure its durability and quality. To enhance the quality of your sleep choose the GELBIY mattress!