Panyam 450

I have the Panyam 600 which is rated for -6 celsius comfort. And that is for me the real comfort limit while wearing base layers and pairing it with Thermarest Xtherm. I'm also a rather cold sleeper. Panyam 450 without additional down at -16 would be extreme limit and certainly not comfortable.

>*Cumulus* Looks nice. Their [Panyam 450](https://cumulus.equipment/en/eu/p/down-sleeping-bag-panyam-450) looks like it could fit the bill for OP. What I like a little less is that they don't clearly state which measurement method they used for their fill power rating. US cuin measurement give higher ratings than EU cuin. I'm still really happy with my [Yeti Vib 400](https://nordisk.eu/products/vib-400-right-zip-black-fiery-red) (now Nordisk) which looks similar, if maybe a little colder.

I have the Panyam 450. It’s not the most ultralight option but it’s very comfortable. Have you also considered the Cumulus Lite Line 400? The comfort temperature is +2ºC but it’s lighter and apparently it can be pushed to 0°C.

I had three of those bags in my house at the same time along with a panyam 450. The s2s was the -1 version. I was disappointed with my quilt for shoulder season temps so decided I wanted a bag. Comparing the loft side by side the WM was the winner and I liked the extra width being a bit bigger. If you are ok with the standard size of the xlite and the standard 3mm zip the xlite is a great buy. Ps as you eluded too the Sea to summit ratings are T lower limit ratings, the comfort rating of their -1C bag is 4C, the comfort of the -9 is -2C, #marketing

Before you buy, I'd read through Dan Timmerman's blog: [https://timmermade.com/blog/](https://timmermade.com/blog/) He says it better than I will. But it comes down to wrapping yourself with the right thickness of insulation for the least amount of weight and money, which means you need a bag that fits your body and sleeping position, and uses the right amounts of top-notch materials. **Keep in mind insulation is a complete system**. It includes sleeping pads and shelters. \-A thin CCF pad under an air pad boosts R-value for cheap. Decathlon's foam roll is 210g and 9 Euro. GG thinlite is half the weight and double the price, which is still cheap. \-A bivy bag can easily add 5C to your warmth because it prevents wind from stealing your warmth. You can find them on aliexpress for \~30 Euro in the 250g gram range, or from cottage makers in US for more $ and less g. Keep in mind, you do still want good ventilation to prevent condensation. Feathered Friends is gold standard. Quality is top. The price reflects that. Any of the FF 10F (-12C) or 0F (-18C) bags could work. Don't get confused by names. Just look at the girth specs, and fit to height. **Maybe** in your price range with the USD being cheap right now. I think the Cumulus Panyam and Teneqa series check all the boxes at a fair price. Choose the weight you need, add an extra 60g of down, and size it to fit yourself. Good options on website. You'll come in right around 400-500 Euro. Cheaper than that is Aegismax. \-G is the 850 FP goose down UL winter series, Choose your weight and length. Is it totally dialed in? No, but it's a really solid choice. \-D is the 650 FP duck down budget series. Adequate, not ideal but worth mentioning though My best personal experiences have been with \-Feathered Friends Flicker 20 (-7C) for general 3 season use, which I like for versatility. It works down to actual rated temp with the right shelter, pads, campsite selection, clothing. \-Aegismax Mini 6C which is good for summer use (which is half the year where I live), but was impressed with brand.

Take a look at cumulus bags. They can do custom fill (up or down, “waterproof” different fabrics etc ) and custom sizing for it as well if you wish. Not cheap but personally I think they’re the best down bags on the market.