Simond MT500 23°F Polyester Sleeping Bag

A very good product, well-priced and frankly very warm. Used on a 3-day outing where there was morning frost, no problem. It takes up a very nice volume and protects perfectly. Downside, you have to fold it and compress it carefully to put it back in your bag! Not easy the first few times, don't be in a hurry to leave ;-).

Price performance

It can be said that the values in the comfort range are good, but in this case it varies from person to person in my opinion, the comfort value of this jumpsuit is ideal for 0 + 5 degrees. When I use it at minus degrees, local frostbite is inevitable. You should know that this jumpsuit will do your job up to 0 degrees. You cannot find a lower comfort level in synthetic jumpsuits. If you are going to camp at minus degrees, I think you should look at goose down jumpsuits. You will see a minimum of -15 at any high altitude during the winter. Even if you stay in a tent with a stove, when the stove passes, it reaches the same value as the outside environment. The inside of the tent, that is, the jumpsuit, is of vital importance. Make your choice consciously. This comfort value will do your job in Istanbul. If there was a synthetic jumpsuit with a comfort value of -15, it would be more guaranteed at least for winter. I wish there was an option for all conditions, but there is not.

The product is very light, the color is very nice, it keeps warm.

For this price, I wasn't expecting much and was surprised that the sleeping bag maintained a comfortable temperature during the first test at -2°C and with thin sleepwear. However, it couldn't go any lower without some help. Combined with a summer sleeping bag (Abisko Two Sewing), I almost felt a buildup of heat at -6°C. The sleeping bag is very wide, making it very comfortable, and another sleeping bag easily fits inside without it feeling tight. This makes it the perfect combination sleeping bag when it gets really cold. I would personally assume that you could sleep warmly in combination at -8°C or lower (unfortunately, these temperatures are very rare here). There is one point for improvement, though: the clamp for adjusting the hood is very awkwardly shaped, and you never know where to press. It should be replaced!

warm and comfortable but very bulky, bulky and heavy

I used the product while camping in the plateau at the end of January and the beginning of February. I had an insulated inflatable mat underneath me and I literally sweated when I stood there for too long. I ventilated it from time to time and did not feel cold from my feet to my head. It was over -7 degrees at midnight. It would have been better if the cover was a little more durable and compressible. Other than that, it is a great product.

I tested the sleeping bag down to -3 degrees Celsius, and the temperature rating is just right for me. It's a bit of a shame that the bag expands quite a bit when compressed.

I had to return it because it was too small and takes up a lot of space in my backpack, but other than that it's good quality! The only annoying downside is packing it back into the case.

Attention! Sleeping bag without a second zipper, which I found extremely inconvenient for normal thermoregulation. I am returning it to the store.

Tested in the high mountains of South America on several treks with temperatures below -5°C. We weren't cold. The bag is comfortable. It's quite bulky, but this is normal since it's a synthetic bag. I recommend it!

The product is very good, I bought it for a Türkiye tour and I felt very comfortable.