This vest offers a light and comfortable feel, using Clima Air®, which excels in heat retention. It's suitable as a mid-layer and can be used throughout the fall and winter seasons. Specifications: 【Material】Clima Air® [Polyester] Sides: Clima Plus® 100 [Polyester] Chest pocket: Nylon 【Average weight】182g 【Features】Zipper doesn't touch the chin/3 zippered pockets (1 on left chest, 2 on waist) I wore it for one season. I think it's good for the coming season.