Bluestone European Styling Reversible Down Alternative Topper. Two Toppers in one. Enjoy the cool side of Microfiber for warm nights, or the soft warm side of Sherpa for cool nights. Durable, soft, and practical to use year round. Breathable Microfiber keeps you cool and dry. This topper protects your mattress from wear and tear, Box stitching to keep filling uniform along the entire topper.