I have both the Decker Supreme and the Rolling Decker. Both Bags are outstanding and fit right on the tour pack rack. they both come with an atttacked water proof cover with reflecting material. The Decker is always a part of my touring gear.

 

3 years ago i researched tourpack bags and ended up with nelson-riggs gwr-1000 it is slightly larger (will hold 2 full face lids plus)and it was 90$ less. the quality has benn good,i dont even bother with the rain cover i rode in 10 hours of heavy rain and only slightly damp.

 

I first bought the decker but felt too much space was taken up by foam. Returned it and went with the dakota. Same basic idea but lots more space inside.