What Our Gearhead(R) Experts Are Saying:"I fished a full bluebird day in this shirt and never once thought about taking it off despite the heat. The brrrdeg fabric genuinely performs, the zippered chest pockets are big enough for a fly box, and the built-in chamois at the hem has already saved my lenses more times than I can count."The sun is already up and the water is already warm when the best fishing days begin. The Simms Stone Cold Long-Sleeve Shirt was built for exactly those days, combining brrrdeg Triple Chill Effect technology with a stretch woven nylon construction that wicks moisture, dries fast, and actively keeps body temperature in check when the heat index starts climbing and the fish are still eating. UPF 50+ coverage handles the sun from above while the 110 gsm fabric stays light and breathable enough to move through a full day on the water without ever feeling like a burden. Two oversized zippered chest pockets swallow a large fly box whole and keep it secure through casts, wading, and whatever scrambling the bank demands, while a side-entry stash pocket handles everyday essentials with easy access. A built-in sunglass chamois stitched into the hem keeps lenses clean and within reach all day long, the kind of detail that earns its place the first time you use it and never stops earning it after that.