If you carry a bit more and you need this extra strength in the fabric, the best choice is the top quality canvas cotton bag. Canvas cotton fabric is a heavier fabric than cotton what means longer durability of your bag. Ecology is colourful as we offer a wide range of coloured canvas fabric your bag can be made from. Flat Canvas Bag is: - made from 100% high quality 280gsm cotton fabric - available with short and long handles (Extra- long handles fit perfectly over the shoulder) Size: