ExOfficio Men's Bugsaway Breez'r Long-Sleeve Shirt Nylon Imported Button-front shirt in moisture-wicking fabric with long sleeves and Sun Guard 30+ protection Insect Shield technology repels mosquitos, ticks, ants, flies, chiggers, and midges. Repellent lasts 70 washings. Flow Thru Ventilation System on front and back for ventilation