UPF 50+ Rating (Solid Colors Only): Solid Colors feature UPF 87+ rated pure Polyester to minimize sun exposure—ideal for fishing or sailing. Heather Colors use a specialized Poly/Spandex blend, offering effective everyday coverage and durability for land-based training. Fabric Weight & Texture Guide: Solids are ultra-lightweight and silky for breathability in heat. Heathers feature a substantial, textured feel with enhanced stretch. Both wick moisture instantly to keep you dry during hiking, running, or gardening. Raglan Comfort & Reflective Safety; Ergonomic raglan sleeves feature flatlock seams to prevent skin irritation during repetitive motion like casting lines or swinging clubs. A reflective element above the back hem increases visibility for safer early morning or night runs. Activity-Specific Performance: For Water (Fishing/Surf): Select Solids. Lightweight rash guard performance that won't weigh you down when wet. For Land (Hiking/Golf/Travel): Select Heathers. Durable 41-way stretch fabric provides unrestricted comfort for outdoor work. IMPORTANT SIZING ALERT: Snug Athletic Fit (Next-to-Skin). Designed to reduce drag. For a Form-Fitting look: Order standard size. For a Relaxed feel: You MUST ORDER ONE SIZE UP. Machine washable, tumble dry low.