Brand new, unused! I've opened it for the photos. I will compress it for shipping, so please be aware of that before purchasing. Size: S 【Built-in Tube】A tube is built into the neckline, allowing you to adjust the amount of air inside the clothing at any time depending on the temperature. No need to carry an air pump. Note: When blowing air for the first time, remove the ON/OFF valve of the hose and fully inflate the breath thermo. 【Jet Out】The clothing structure jets out the wind, creating a low thermal conductivity static air layer that blocks cold air and traps heat inside the body. 【Moisture Permeability & Breathability】Enhanced breathability and moisture permeability through a highly moisture-permeable membrane and micropores. Utilizing patented 3D gluing technology, it breaks the contradiction between airtightness and breathability, making the wear warm and breathable. 【Air Warm Wear】Suitable for outdoor activities in temperatures from -5°C to 20°C, you can adjust the temperature by adjusting the amount of air. Suitable for morning runs, outdoor hiking, fishing, etc. 【Environmentally Friendly】Uses air instead of duck & goose down to protect animals. [REARIX] Men's Vest Women's Vest Spring/Summer Vest Jacket Modeling Tool Decoration Handmade Tool Craft Clay Moisture Permeability & Breathability Running, Outdoor Hiking, Fishing Air Vest "TY0002" Black and White 【Industry First】 u3