100% Polyester lightweight fishing shirt with Solar-Factor UPF 50+ UV Protection keeps you cool and dry with moisture-wicking and quick-drying technology. Additional features like stain release, dual chest pockets, vented collar, and a fly rod holder make this shirt functional and stylish.  Solar-Factor UPF 50+ UV Protection Soft and Comfortable Lightweight Polyester Dobby Pongee Moisture Wicking Technology Sweat-Powered Cooling Quick Dry Stain Release Dual Chest Pockets with Drain Holes Vented Cape Back and Shoulders Fly Rod Holder Gear Loop with Hidden Sunglass Cleaner Vented Collar Adjustable Sleeve Construction Specs 100% Polyester Machine wash cold with like colors, Close hook and loop tape before washing, Only non-chlorine bleach when needed, Tumble dry low, Remove promptly, Cool iron if needed Fit The model 5'10" and 200lbs is he is wearing a size large Relaxed fit for extra comfort and mobility, if you think you are between sizes best to buy the smaller size.