Simms Stone Cold Short Sleeve Shirt The coolest performing stretch-woven shirt in your kit, slip into the new Stone Cold SS Shirt that wears like a breath of fresh air and now comes equipped with side-entry chest pockets for easy access to your everyday essentials. - Stretch woven nylon with brrr° Triple Chill Effect technology that provides cooling, wicking, and rapid drying for crucial warm weather performance - Two side-entry zippered vertical chest pockets big enough to hold a large fly box - Built-in, convenient sunglass chamois at the center hem - Sun protection - brrr° Triple Chill Effect - Proven To Keep You Cooler - UPF 50+ Fabric Tech Main Body: 94% brrr° nylon, 6% elastane woven; 110 gsm Item #: PG-14123