Keep the pests (no, we don't mean your neighbors) that can mar your perfect day at bay with Lentek's Bite Shield ($19.99). As the name implies, it protects you for up to 72 hours from mosquitoes, no-see-ums, flies and the like. It emits the aroma of Geraniol, an essential oil that insects seem to hate. It works outside in an area up to 15 feet on a flat surface, or clipped to a belt.