M-WaveâÂÂs Hudson Bay is a multifunctional waterproof large duffle bag.The Hudson Bay can be integrated as an extra top bag into the M-Wave Canada Pro series rear pannier bags, or just used as a handy bag generally.The useful 28L capacity duffle bag is waterproof and has reflective stripes to help ensure safety in the darkness. With a handy shoulder strap, the duffle bag can be carried comfortably off the bike.