This is how we found ourselves buying two new sleeping bags reduced from $80 to $50...and then with 50% off. I asked twice for the checkout lady to confirm this, but it was correct. That's £12.50 each!! (We're still working on the exchange rate of the day we moved here...)
I cleverly pointed out to Hannah that we should buy her a left handed one, her being a southpaw and all, but it was only when we got home that I realised the left/right combination had nothing to do with opening the zip with your most dexterous hand. One of each meant we could zip them together into one huge, cosy, good-down-to-minus-seven-Celsius padded envelope of snuggliness!
Joined at the zip.
That should keep the cold out.