Recommendations needed light sleeping bag

Information that would be helpful, since people in this subreddit live everywhere.

* What is the climate where you will be sleeping?
* What are the average temperatures at night?
* How warm do you sleep in general?
* How warm is your mattress pad (if anything sleeping pads can affect how warm you sleep more than sleeping bag)

With this sale, probably the best bang for your buck on the market right now. Excellent choice.

Be warned, its cut fairly slim.

Sleeping bags are quite personal. A super tight cut is more efficient but doesn’t work for some. Some mega light mummy bags have a rather tight toe box (38″) for my 11.5/46.5 feet. If a sleeping bag is too roomy at the feet it will be inefficient and with all of that extra space your feet are going to be cold on a cold night. There are circumference measurements for feet, hips and chest in addition to length. Try on a few sleeping bags. If possible rent a few before buying. If you’re a side sleeper do you sleep on the left or right side? Perhaps a top zip bag might be better for you if you’re an indecisive side sleeper who tosses and turns back and forth. For the vast majority of people a side zipper is the ticket.

It also depends upon how cold you sleep. Just like how much clothes one person might be dressed in an arctic coat, insulated pants, serious gloves… and still feel cold while another is wearing a sweater and feels comfortable. A cold sleeper should get a warmer sleeping bag. Temperature ratings are a suggestion – take them with a few grains of salt. The coldest temperature used is not about comfort but just that you probably won’t die. For temperature ratings the middle number is supposed to be for the “average” person. Being exceptionally tired, sick with diarrhea, hungry, shitty leaking air mattress… all make you colder. Plan accordingly with your purchase.

I like down insulation but good synthetic is getting closer to down. They’ve been saying that for at least 40 years and (good) down is still considerably lighter for a given warmth while compacting smaller. Down also has a wider comfort range than synthetic like wool vs synthetic. Assuming that you’re not an idiot down lasts at least 2x as long as synthetic. Down costs more and is kinda useless when wet and when soaked is impossible to dry without a dryer. Down has “fill power” which is typically 600-850. Some down is more insulative for it’s weight than other down. It means that 1 ounce of down fluffs up to “X” cubic inches. The higher the number the better – but more expensive. Higher than 800 fill power gets expensive and it’s worth pulling out your calculator to decide $ spent vs weight saved. The highest I’ve seen is 950-1000 fill power. It was a little lighter but $$$ more than the 850 f.p.

The correct answer is – it depends. Try out some sleeping bags.