UYN Exceleration Wind is an innovative combination of a shirt and a windproof jacket, making it a new and super versatile running garment. Wear it when the weather is uncertain: the windproof, water-repellent front gives you just the right level of protection, while the back is designed to wick away moisture. The effect is enhanced by Coolvent technology, which rapidly absorbs sweat and creates a constant flow of air over the skin. CoolventVentilation. So cool. The channelled inner surface promotes a constant flow of air. It quickly absorbs sweat, cools the body during activity and keeps the skin dry.