THE CLOWNFISH CoolBELL Water Resistant Polyester Unisex 17.3 inch Laptop Messenger Bag Briefcase Handbag (Grey) PREMIUM MATERIAL: This stylish laptop messenger bag is made of water resistant Polyester fabric. For the inner lining, soft feel polyester fabric is used. The metal fittings such as zipper heads and pullers used are smooth, sturdy and durable.