Really blocks odors. You can be assured that if you package and store the contents properly in this case, I don't think it will be detected by the human nose; even if it is stored indoors. Even if you smell the spot where two lightning bolts meet, you won't feel anything. The bag itself has plenty of space, good performance, solid construction, looks like a normal duffel bag. This also works well as a lockable main travel bag (to keep medicines safe, etc.). The lock works well, the grip isβ¦