This ultra-versatile, breathable shirt provides UPF40+ sun protection and chemical-free Mosquito Protection Technology that doesn&';t wash or wear away. Built-In Mosquito Protection Chemical-free Mosquito Protection Technology (MPT) uses a tight weave to block mosquitoes for long-lasting defense. Partial elastic cuffs help seal out insects while maintaining comfort. UPF 40+ Sun Protection Blocks harmful UV rays to protect skin during long days outside. Ultralight Ripstop Made with 100% recycled polyester ripstop for lightweight durability and abrasion resistance on the trail. BluesignA(R)-approved recycled fabric: materials and production minimize the impact on people and the planet 100% polyester