DURABLE MATERIAL LININGS: Polyester - Perform over a long period time, anything flimsy or cheap on the inside reflects the overall craftsmanship and expected lifespan of the product. Think long-term and remember that you're probably going to be hard on it. ZIPPERS are a very important component of a bag and should never be compromised. Once a zipper fails, a bag might become useless. Our bag have very sturdy zippers and operates smoothly Perfect for biking around town, festivals, fairs, concerts and farmers markets. The bag can carry a phone, cash, cards plus a few other essentials and can be worn on your hip, over the shoulder or tight under your arm. Our product use QUALITY FABRICS, we have long term quality warranty - 18 Month Warranty