Please refer to size chart before ordering: M-Length:28.0"/Chest: 38.6"/ L-Length: 28.7"/Chest: 40.6"/ XL-Length: 29.5"/Chest: 42.5"/ XXL-Length: 30.3"/Chest: 44.9". They are the perfect thinness for chilly days when a heavy coat is too much, suitable for running, jogging, hiking, fishing, cycling, camping, mountain climbing and other outdoor sports. It's so light and not bulky, easy to work great over a simply long sleeve shirt.Perfect for spring daily wear. Collar can be worn up or down, to accommodate style of shirts.Quick to wear and matches other items perfectly. Core warmth is critical, and the arm surface is used to disperse excess body heat.So that your arms can be free to work and not bulky. 🌸Hand Warmer Pockets /Gently Contoured Silhouette /Casual and Simple Style /Autumn, Winter and Spring Wear /Zipper. 🌸Material:100% Polyester. Polar Fleece fabric. Light weight, but soft to keep your core warm.TIPS:If you are bosomy or you prefer a loose-fitting style,size up will be recommended.