G'day Andrew,

From 23Zero directly they state:
How much bedding can I store inside?
- 23 zero rooftop tents were designed to allow sheets to be left on and a thin blanket or sleeping bag left inside.
-If the side straps do not touch or you need to sit on the tent to get it to close then you will cause permanent damage to your tent and shorten the life of your cover zipper. ( the zipper tab will be the first to break)
-Memory foam toppers will NOT allow the tent to fold correctly and will cause permanent and irreparable damage.

So, we haven't tried it personally, but as long as there's no obvious stress to the tent when packed up, you'll be ok!

G'day Jordan,

Yes, the 23Zero Swag bags are fairly generous, so as long as you get a good tight start on your swag roll, you should be able to fit the swag back in the bag with the sleeping bag rolled up inside.

G'day Beverly,

We have had mixed reports on the carry bag for these sleeping bags. The Oztrail Canvas Duffle Bags are a good alternate option, the Large size will give you plenty of space for the bag and a pillow or two.

G'day M,

The washing instructions can be downloaded on the product page in the details and specs section. They specifically state to air drip dry only, so we'd recommend sticking to that, as you might end up with a funny size/shaped sleeping bag if you tried putting it in the dryer.

G'day Brent,

I've double-checked the washing instructions on these, and Dry Cleaning isn't recommended. 23Zero recommend washing with a mild detergent on the cold gentle cycle of a commercial size front loader, then air drying. 

G'day Abu,

The pillows aren't attached to the sleeping bag so they can be used or removed as required.

G'day Romy,

There are no sewn-through seams in the bag to keep the fill material in place, however, the nature of the hollow fibres should keep it in place.

G'day Philip,

23Zero uses SBS zippers on all of their products.

G'day Rob,

To be honest they look pretty similar and have similar features. They both have 8Oz canvas, and zippers on both sides, the Alaska is slightly larger than the Cold Mountain and will be slightly warmer. 

G'day Ros,

I've just tried this out for you and I can confirm that you can completely unzip the top and bottom sections to make two separate 1400mm wide doonas. One side will have the hooded section, however, it is possible to do as you've suggested.

G'day Zach,

The Alaska Black 1400 is an all in one sleeping bag, so doesnt have any removable layers.  If you're wanting an option with abit more versatility you could look at the Coleman Pilbara C-5. 2 of those zipped together will make a double sleeping bag with a removable liner.  
Hope that helps.