It's the item everyone's talking about! You'll want to keep touching it! Soft diamond fleece with aluminum print on the back! Perfect as a mid-layer on cold days! Also great for relaxing and staying warm in a mountain hut! ●Product Features● Premium aluminum print! ・Employs aluminum print on the back that emits far-infrared rays! Comfortable to wear! ・Diamond fleece with a great feel against the skin ・Stretch knit material used for the underarms Useful features ・Reflective print on the zipper of the left chest pocket for enhanced visibility Materials Main Fabric: 100% Polyester Separate Fabric: 100% Polyester Back Lining: 100% Polyester