Bug free long sleeve shirt is treated with insect Shield, an odorless invisible insect repellent formulated with permethrin. Insect Shield repels mosquitoes, flies, chiggers, ticks, ants and midges that might carry lyme disease, West Nile and Zika viruses, malaria or other insect-borne diseases. This sun protection, quick dry, travel-friendly, moisture wicking shirt provides mesh lining and venting at back yoke for changing temperatures. Details: Front patch pocket, roll-up sleeves with tabs, shirt tail hemn and center back is approximately 30'' long. Material: Nylon.