Not only is Insect Defense System Long-Sleeve camp shirt decked out with plaid and outdoor performance, it's equipped with No Fly Zone™ insect-repellent technology by Burlington. Treated with permethrin, a synthetic form of a naturally occurring repellent found in the chrysanthemum flower, this shirt creates an invisible barrier that protects you from multiple species of pesky insects. Crafted of ultralightweight polyester, this breathable, quick-drying, moisture-wicking shirt is about as comfortable as it gets. UPF rating of 50. Swiss-tab sleeves add versatility. Hidden hook-and-loop collar points. Straight hem for comfort. Welt chest pockets with hidden zippers. Imported. Sizes: M-2XL. Colors: Grey Plaid, Green Plaid, Blue Plaid, Yellow Plaid, Blue Moon Plaid, Golden Sun Plaid (not shown), Goose Grey Plaid, Olive Grove Plaid.