The Sitka Gear Ascent Shirt is designed for those warm early season hunts. The weave of the Sitka Gear Ascent Shirt and flip-up collar provides a physical 29UPF barrier. The Sitka Gear Ascent Shirt is body-mapped for breathability, and the meshed underarm panels and chest pockets help with ventilation. The form-fitting sleeves give you ample string clearance and Sitka Gear's Polygiene odor control technology fights off odor-causing bacteria when you are out in the heat for days on end. To flush out your Sitka Gear Ascent Shirt pair it with the Sitka Gear Ascent Pant, and the Sitka Gear Ascent Vest. FEATURES Mesh Underarm Panels and Chest Pockets for Ventilation Flip Up Collar for Sun Protection Quick Dry SPECIFICATIONS Breathability Odor Control Warmth Moisture Wicking Durability Fabric Details: 20-Denier Stretch-Woven nylon ripstop, quiet knit polyester grid jersey Weight: 4.7 ­oz MPN: ­50160 Size Chart: ­Click Here Performance Fit, designed for minimal layering. OPTIFADE SUBALPINE Designed for stalking and ambushing ungulates from ground level in tree-covered and vegetated terrain. Subalpine is optimized for engagement ranges of 50 yards and less. TECHNOLOGY POLYGIENE Polygiene Odor Control Technology is a natural fit for hunting. By permanently treating fabrics with low concentrations of silver salt, which has inherent antimicrobial properties and is naturally present in water, Polygiene safely eliminates the ability for bacteria to grow and effectively neutralizes odor. YKK ZIPPERS Sitka Gear uses premium YKK Zippers across their product line for reliability, durability, weather resistance, and quiet operation. They also print many of their zippers with GORE OPTIFADE Concealment for added stealth. GORE OPTIFADE CONCEALMENT Traditional mimicry patterns based on human vision are designed to look like a specific type of vegetation or terrain. GORE OPTIFADE Concealment is the only scientifically proven concealment pattern based on animal vision to optically fade a hunter into their surroundings. By using advanced blends of micro and macro patterns to fool animal vision rather than mimic a particular shape, GORE OPTIFADE Concealment is more versatile and more effective at getting hunters close to game. SITKA DESIGN NOTES Hunters have struggled to find a technical hunting shirt for hot weather often relying on their base layer to fill this need; and most base layers are not optimized to be worn as outerwear because they lack the durability and UPF protection needed for early-season hunts. Sitka's approach was to create a lightweight yet durable technical hunting shirt, something that hadn't yet been offered to the big game hunter. We've leveraged Sitka's textile development and construction prowess to deliver evaporative cooling, UPF protection without chemical treatment and resistance to chafing from backpack straps.