What Our Gearhead(R) Experts Are Saying:"I fished a stretch of river during peak bug season in this shirt and the Insect Shield treatment genuinely delivered where every other solution I have tried has eventually let me down. The stretch fabric moves naturally through a full day of casting, and the hidden pockets above the chest are the right size for a tippet spool or a pack of strike indicators without creating any bulk."Bug season and great fishing season have an inconvenient habit of overlapping completely. The Simms No-See-Um Bugstopper Long-Sleeve Shirt was built for that exact reality, pairing Insect Shield(R) protection with a stretch polyester construction that keeps the bugs at bay without asking anything in return from comfort or mobility. Insect Shield(R) bonds permethrin directly to the fabric fibers for long-lasting, effective protection that does not wash out after a few trips and does not require any additional application before heading to the water. The stretch fabric moves naturally through every cast and wade, lightweight enough at 115 gsm to stay comfortable through warm days and breathable enough to keep things from becoming suffocating when the sun gets serious. A classic button-down closure and two button-closure chest pockets keep the look clean and familiar, while two hidden pockets positioned above the main chest pockets add fast, low-profile storage for tippet spools, strike indicators, and the small accessories that disappear into a vest or pack but always seem to be needed at the wrong moment. When the evening hatch brings the fish up and the bugs out in equal measure, this is the shirt that lets you stay focused on the right half of that equation.