Cocoon Insect Shield Safari Silk Mummy Bag Built-in insect protection with Insect Shield protection - invisible, odorless, does not change the feel of the fabric. Long-lasting - gear treatment lasts through 6 months of constant exposure to sun and rain. Tightly bonded to the fabric so it's near your skin, not ON your skin. Protects against mosquitoes, ticks, ants, flies, fleas, chiggers and no-see-ums. Use in your hammock, lakeside or on the beach during the day.