Tough as nails outer layer, check!
The outer layer is made from strong Rhinocote™ fabric, which can take a lot of abuse and has high tear, chafing, and abrasion resistance. Round the world, motorbike riders understand the need for strong, tough materials.
With this fabric as the first level of protection, it allowed us to add usable tie-down points, which are not always found on PVC/TPU duffel bags. To add more redundancy, we also padded the bottom layer for more protection, to prevent chafing and abrasion from damaging the inside layer and to be kind to the motorcycle paintwork and bodywork.