We use CORDURA® material as the outer layer of our bags. Military clothing and equipment are also made from it. UV-resistant, highly wear-resistant, impregnated material. The inner layer is made of waterproof tarpaulin. The larger bags are lined with a thicker truck tarpaulin, while the smaller ones are lined with a thinner, more wrinkle-resistant, lighter tarpaulin. On the messenger bag, the inner and outer layers are sewn separately, and we only join them together at the turn-off part, so the inner layer 'floats' inside the bag - so rainwater cannot seep in through the seams. The shoulder straps of our bags are made of seat belt webbing. The reflective strips come from 3M, the zippers and velcro are YKK products. Our suppliers of plastic accessories and buckles are Duraflex and YKK. The bag is made of CORDURA® outer and thin tarpaulin inner layer - this makes it a light, yet strong and durable bag. We sew a reflective strip on the lower part of the bag (which is best visible from the back when you are cycling).