DICKEE Helmet Liner Skull Cap Beanie With Ear Cover Running Hat for Cycling Winter Outdoor Windproof Warmer Black FOUR SIDES HIGH ELASTICITY: Wear without restraint and not tight, size S/M is for children and size L/XL is for adults with a small head SAFETY AND COMFORTABLE: Reflective logo design for night safety and it feels very smooth, comfortable materia ATTRACTIVE AND DURABLE: Use 4 needles 6 threads sewing craftwork, more firmly and more beautiful THREE LAYERS COMPOSITE FABRIC: Use 250g type fleece and thin film, warmer, antistatic and waterproof, good for cycling, running WINDPROOF AND KEEP WARM: Combine windproof fabric and sanding micro fiber to make you warmer, good for sports in cold weather