White Sierra Men's Bug Free Sanibel Long Sleeve Shirt 100% Nylon Peached Woven Imported Travel friendly Insect Shield fabric repels insects, including those that can carry lyme disease, west nile virus, malaria and other insect-borne diseases UPF sun protection fabric reduces your exposure to harmful UVA/UVB radiation Moisture wicking fabric pulls moisture to the surface of the garment for quick Evaporation Mesh lined yoke