SITKA ASCENT SHIRT. The Ascent Shirt was engineered to persevere through the hot & harsh conditions of early season hunts. Extremely breathable, quick-drying and UPF shielding make this form-fitting base layer your best friend. Streamlined sleeves provide ample string clearance, mesh-backed & zippered chest pockets deliver extra ventilation to keep you cool on the move. Product is Performance Fit, designed for minimal layering. Ascent Shirt is a part of early season system. Whether you’re glassing under the blazing sun in an alpine basin or busting out miles in elevation, the Early Season System delivers maximum breathability and moisture management to keep you cool, dry and concealed without sacrificing durability. Lightweight, packable layering solutions enable the system to adapt to your environment as the conditions change in even the most remote places. 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 shielding 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. They leveraged their textile development and construction prowess to deliver evaporative cooling, UPF shielding without chemical treatment and withstanding to chafing from backpack straps.