features multiple functions, such as back zip pocket for item storage, reflective brand logo for night safety, elastic waistband with drawstring for comfortable fit, mesh air vents for enhanced breathability, long mesh liner for optimal comfort and protection. This running shorts allows full range for motion and activity, great for any man who love sports. Features: Size is optional: S(CN),XS(EU)=Waist 24.8-26.8 / M(CN),S(EU)=Waist 27.2-29.1 / L(CN),M(EU)=Waist 29.5-31.1 / XL(CN),L(EU)=Waist 31.5-33.5 / XXL(CN),XL(EU)=Waist 33.8-35.8. Breathable polyester fabric, keeping you cool while doing exercise. Built-in long mesh liner wicks moisture and dries quickly for optimal comfort and private protection. Elastic waistband with adjustable internal drawstring for customized and comfortable fit. Zippered back pocket for safe storage of small essentials, like key, mp3 player, changes. Mesh air vents on both sides for increased breathability. Reflective brand logo for visibility and safety in low light.