100% nylon (Cordura). Silicone coating. Water-repellent and resistant to wear, tear, and abrasions. Adjustable strap. Zip closure. Branded pull tabs. Reflector prints for nighttime visibility. The bag can be stored in its inner pocket. and wander’s Sil Waist Bag is made using Invista’s Cordura nylon material that is silicone coated to repel water and resist wear, tear, and abrasions. It features an adjustable strap that allows you to wear it multiple ways, with zip closure and branded pull tabs. When not in use, you can conveniently store the bag in its inner pocket.