We don’t ask for either plastic or specimen transport bags at the grocery (or drug or discount) store. In both our cars, we have reusable bags that we carry into stores. Plastic bags seem to accumulate, nonetheless. We try to avoid accepting a bag anytime, but sometimes it’s unavoidable. The tote bags used for groceries are too grubby to take into clothing stores, and some items are too large for the tote bags, especially at gift-giving times. The bigger bags we get then are used for extra large items that must go into the trash, such as a broken coffee maker or discards from the garage or workroom.
There are some sacrifices though in going with a bag that offers all that room to move. The biggest possibly being your heating capabilities and warmth ratings. See, while having all that room is nice, just like having a big house with tall ceilings it takes a lot more to heat the inside. The extra space requires more effort to keep warm and therefore, isn’t as effective for keeping out the cold as a mummy bag is. Of course having said that, the pajamas you choose to sleep in can help make up for the warmth differences between the bags as well…up to certain temperatures. Suffice to say that artic temps may require more than a teddy or pair of boxers.
The other sacrifice is the can liner bags or bulkiness of the bag. A mummy sleeping bag for the most part will be much smaller for carrying around which is why it is a preference for many backpackers/hikers. The rectangular sleeping bag isn’t as small but since it’s not typical to be carrying it, other than somewhere in a vehicle while getting to your intended destination, the bulkiness of the bag is not as big an issue.
Temperature ratings are pretty important pieces of information to consider when choosing a bag as well. And although mummy and rectangular sleeping bags can cover a wide variety of temperatures, mummy bags are the typical designs for the extreme polar temps such as those you would find in the Andes.
If you see a +20 degree rating that would mean that the bag should be warm enough for temperatures that are 20 degrees or reclosable zip-lock bags. And if you see a – 20 degree rating then it has been determined that the bag should be warm enough for minus 20 degree weather.
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