Simms Stone Cold Long Sleeve Shirt The coolest performing stretch-woven shirt in your kit, slip into the new Stone Cold LS Shirt that wears like a breath of fresh air and now comes equipped with a side-entry stash pocket for everyday essentials. * Stretch woven nylon with brrr° Triple Chill Effect technology that provides cooling, wicking, and rapid drying for crucial warm weather performance * Two zippered vertical chest pockets for easy access * Vertical chest pockets are big enough to hold a large fly box * Built-in, convenient sunglass chamois at the 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-14122