Outdoor Research Men's Sentinel Pants 100% nylon, odorless, EPA-registered Insect Shield Imported Insect Shield is odorless, safe, and EPA-registered; lasts the lifetime of the product (over 70 washes) SolarShield construction Lightweight, quick-drying Supplex nylon; UPF 50+ Insect Shield clothing repels mosquitoes, ticks, ants, flies, chiggers and no-see-ums for utlimate insect protection Intergrated belt; snap and zipper fly