G'day David,

Because the Sea to Summit Basecamp BCIII Sleeping Bag uses duck down for its insulation, it can have a slight animal smell at first. I'd recommend you get the sleeping bags out and air them for a day or two, you'll most likely find that this gets rid of the smell as it's been contained for a while in the packaging. I wouldn't recommend washing it as water can lessen the insulation properties of the down, potentially some talcum powder or other odour eating powder could help as well. 

G'day Kevin,

The sleeping mat shown in the images we've got for the Sea to Summit Basecamp BCIII Sleeping Bag is just to show how the straps function on this bag, the mattress itself is sold separately. 

G'day Neil, 

We weren't too sure what the answer was to your question, so I gave Sea to Summit a call. They told me that they haven't heard any feedback regarding the Basecamp BCIII bag not fitting securely on a comfort plus mat.

I'm assuming you're interested in the Long size BCIII bag as you have the Large sized Comfort Plus Mat. Sea to Summit have confirmed that this combination should be a compatible fit with the straps, and they should be fairly secure unless there was a lot of movement. 

I hope this was helpful Neil! 

G'day Phil,

The Long Sea to Summit Basecamp BCIII Sleeping Bag is 215cm long, I'd say that whilst your feet will probably rest right down the very end, you should be able to fit inside this bag snuggly and still put the hood over your head. 

G'day Paul,

I've just checked this with Sea to Summit and can confirm that the Sea to Summit Basecamp BCIII Sleeping Bag has been DWR treated on the outer as well as on the down.