This is the shirt made with a super-fine mesh material that mosquitoes, ticks, and other pests cannot bite through. Unlike repellents that use DEET or fragrances, this shirt helps inhibit insects and the illnesses they carry such as the Zika virus, West Nile virus, and Lyme disease without the use of chemicals. In tests conducted by the North Carolina State University Entomology Department, the nylon/Lycra fabric blocked 98% of mosquito bites when worn as an undergarment. The breathable fabric does not trap heat, the shirt’s elbows and shoulders are double-layered for added protection and durability, and it can be worn under clothes or on its own. With fitted sleeve cuffs to keep insects out and a UPF 26 sun protection rating. Machine washable and dryable. Made in US. Green. Stretch fit. Unisex S, M, L, XL, and XXL. (1 lb.)