Thank you for viewing! ✨Follow-up discount available✨ Please read the profile before considering your purchase ^^ ☆Brand new☆Free shipping☆Instant purchase welcome☆ We handle one-of-a-kind items! Please take a look at our other products as well♪ #yuansshop ⭐️Product Description⭐️ Size: S Men's vest Spring/Summer vest Jacket Moisture-permeable 【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 completely fill the breath thermo with air. 【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 and Breathability】 Enhanced breathability and moisture permeability through a highly moisture-permeable membrane and micropores, utilizing patented 3D gluing technology to overcome the contradiction between airtightness and breathability, making the wear warm and breathable. 【Air Warm Wear】 Suitable for temperature differences in outdoor activities from -5℃ to 20℃, you can adjust the temperature by adjusting the amount of air. Suitable for morning running, outdoor hiking, fishing, etc. 【Environmentally Friendly】 Uses air instead of duck & goose down to protect animals.