Short Alaskan King 80X108 Size Mattress Topper – 100% Waterproof Cover Protector with 18″ Deep Pocket Fitted Style Super Soft Cotton Terry Fabric Mattress Cover. Size Short Alaskan King. COMFORT & SUPPORT: Breathable and Comfortable : Cotton Terry in Fitted Style and Snug Fits, Elastic Around Mattress Protector Pad Cover, Super soft and Different from other traditional waterproof mattress protector, the surface made from 100% Terry cotton and its soft, airy and breathable Designed to improve sleep quality by providing balanced support and reducing pressure on the body for a more restful experience.