This Callaway men's quarter - zip mock is perfect for outdoor activities like golfing or casual walks on drizzly days. It's designed for men who value style and functionality. The Opti - Shield technology offers UPF 50 protection, keeping you safe from the sun's harmful rays. The stretch reflective tape not only adds a cool look but also enhances visibility. The rubber zipper pull and rib knit cuffs add to the overall comfort. While specific size and weight details aren't provided, it's made to give you a great range of motion and keep you dry and comfortable throughout the day.