The Timbuk2 Gray Nylon Two-way Bike Messenger pannier Shoulder Bag is a durable and functional bag designed for carrying items on your bike up to 15 inches in size. Made of nylon, it features a solid black and gray color scheme that is versatile and stylish. There are two bags that can snap together by magnet but split for bike riding panniers. With its magnetic closure and bike messenger style, this bag is perfect for urban dwellers looking for a practical and high-quality solution for transporting their laptop and other essential items.