This Core 365 men's quarter - zip is perfect for men in corporate settings or those who want a comfortable daily - wear option. It's great for the morning commute, a round of golf, or a family day out. The fabric weighs 4 oz/yd² (139 gsm) and is 100% polyester piqué, which has moisture - wicking and antimicrobial properties. It also offers UV 15 - 39 protection.