Our comfortable running vest come with adjustable straps in waist and chest and different sizes water bladders, satisfy your personal demands, water tube allows you to drink more conveniently. Made of breathable polyester mesh fabric, speed up air circulation and keep your back cool. Lightweight and soft shoulder straps prevent abrasion and reduce burden. Considerate reflective trim and whistle ensure your safety. Ideal assistant for diverse outdoor activities, like marathon, jogging, trail running, riding, etc..