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 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.