Navigate a mangrove labyrinth—without sweating the mileage—in Simms’ Ultralight Shirt. Laser cut venting is an escape route for trapped heat. COR3 fabric technology buffers harmful UV rays to keep skin from frying, while lightweight easy-care fabric unpacks cleanly and breathes relief for a shirt so inconspicuously comfortable you barely know it’s there. Tech features include fly box compatible chest pockets with a tool loop and off-shoulder seams for smooth casts in between hoisting cold beers to parched lips.

• Lightweight, easy-care technical fabric with mechanical stretch
• UPF 30 sun protection
• UPF protection is inherent in the fabric and will not diminish due to laundering
• Laser cut venting
• Two fly box compatible zippered chest pockets
• Tool loop inside chest pocket
• Off-shoulder seams for added comfort
• Sun Cuff design lengthens sleeve over back of hand to provide greater sun protection
• Articulated sleeve design allows for greater ease-of-casting
• 100% Polyester with COR3 Technology
• Approximate weight: 5.5 oz

Skin Cancer Foundation

The Foundation's Seal of Recommendation is granted to sun protection products that have been reviewed by and meet the stringent criteria of an independent Photobiology Committee.

One of the first programs offered by the Foundation, it quickly gained acceptance from consumers for setting the standard for effective sun protection with sunscreen products, sunglasses, specially treated auto and residential window film, umbrellas, clothing and laundry products that wash UV protection into clothing.

To earn the Seal of Recommendation, a manufacturer must provide scientific data showing that its product sufficiently and safely “aids in the prevention of sun-induced damage to the skin.” The data are reviewed by a volunteer committee of photobiologists – experts in the study of the interaction between ultraviolet radiation and the skin.

Learn more The Skin Cancer Foundation's Seal of Recommendation.

Once you put on COR3™ clothing you’ll never give it a second thought. This next evolution in fabric technology has a UPF 30 sun protection rating, wicks away moisture and keeps you odor free on the water and out on the town. All of our shirts utilizing cotton or cotton blend fabrics also feature EZ finish, our easy care treatment built for wrinkle-free travel and minimal care – and right off the rack they feel like an old favorite you’ve been wearing for years.