The Tight Line Long Sleeve Performance Quarter Zip is treated for UV 50 sun protection which is designed to keep you safe and comfortable from the sun&';s harsh rays. Our Salt Life performance tees are made from a wicking fabric that pulls moisture from your skin and evaporates it through the shirt into the air. This allows you to stay cool for your on the water adventures. Quarter Zip Closure Mock Neck Long Sleeve Marlin Raised Silicone Heat Transfer UV 50 Sun Protection Mega soft, ultra light quick reaction fabric Quick Dry and Moisture Wicking Antimicrobial Content: 88% Polyester, 12% Spandex Turn Inside Out and Machine Wash cold, Wash Dark Colors Separately, Hang to Dry