Mattresses 12 Inch Twin XL Gel Memory Foam Mattress with Cooling Cover | Foam | Twin XL

Get the cool, comfortable sleep you’ve been missing with this 12-inch California King mattress—perfect for hot sleepers, side/back sleepers, or anyone tired of waking up achy or sweaty. The PCM cooling cover feels cool to the touch and absorbs excess heat, while 3” gel memory foam cradles your hips and shoulders to relieve pressure. A 4” transition layer adapts to your body for balanced support, and a 5” high-density base prevents sagging—so it stays supportive for years. Shipped in a compact box that fits through hallways and doorways, you can set it up alone in minutes (no tools needed!). It expands to full size in 24–72 hours—ideal for move-ins or guest rooms. CertiPurUS certified, so it’s safe for your family. Soft yet durable, it’s great for apartments, master bedrooms, or any space needing a California King mattress.