It would be interesting to know whether you used a Nylon Silk or 100% Genuine Silk (I'm supposed to have the latter made by widowed ladies in Vietnam), but I'm yet to test it out. I think that Decathlon sell a nylon silk version. Also adding a fleece liner into a future comparison test would be interesting. I am also of the opinion that the comfort factor will probably make you feel warmer even if science may well suggest that you're not. Silk or Flannel/Fleece next to my skin beats the heck out of an itchy wool blanket any day. I'm confident that my 220 x 200 cm commercial wool blanket with a decent camel wool percentage would outperform a lot of expensive sleeping bags, but the blanket is BIG and HEAVY.
Thanks @RobertsBulgaria. The liner used here was sold as 100% silk by a UK silk garment supplier so am pretty confident it is genuine. There are loads of cheapie nylon ones as you say knocking about in online marketplaces. For sure despite the minimal impact on insulation in the test I would also continue to use for comfort and easy washing purposes.
Test seems deeply flawed.. so much heat loss through the surface of the water. Every surface not covered by the test material should be covered by extremely effective insulation
Hi lu, disagree. Every cup has same volume of water and same area of surface water as well as being capped, so the same opportunity to lose heat through the surface. It also produces consistent results if repeated.
Hi Lu, well appreciate the challenge. The only way things are ever improved is to question them. As the maths is just to compare the overall heat lost from the body of water and compare the differences for the differently insulated versions I still don't see deeply flawed (but is suppose thats a matter of definition). There is no assertion that all heat loss is through the isulative material just the relative performance of the cups insulated with different materials. I will run a little test with an insulated cap versus the uninsulated cap to get a firmer understanding of the difference.
@@bigskies2202 I guess in my first comment I misspoke - the results are fine considering the limitations of a home test, but the conclusions drawn aren't. Would be interesting to see the difference. Also you've got to consider that the liner creates extra air pockets 🤔 not drawn tight as in the test. The test is currently of the insulative value of the fabric - but not necessarily the liner used in practice. Gets complicated fast eh
Yeah for sure it's not straightforward. And the layering impact of tiny air gaps etc. certainly is hard to replicate. However have found the conclusion that a silk liner adds a tiny bit of warmth but the main value is in protecting the bag, comfort and being usable in itself in hot weather is pretty close to personal anecdotal experience, and that have heard from others. It's the manufacturer claims of significant extra warmth, e.g. an extra season that would question really. For that a thin fleece liner seems best.
![Does Wool Keep You Warm When Wet? [TESTED]](http://i.ytimg.com/vi/B1kPUCRgt2U/mqdefault.jpg)
![Does Wool Keep You Warm When Wet? [TESTED]](/img/tr.png)
![Alpaca vs. Cashmere - Which is Warmer? [TESTED]](http://i.ytimg.com/vi/lTIUhRGdNQ4/mqdefault.jpg)
It would be interesting to know whether you used a Nylon Silk or 100% Genuine Silk (I'm supposed to have the latter made by widowed ladies in Vietnam), but I'm yet to test it out. I think that Decathlon sell a nylon silk version. Also adding a fleece liner into a future comparison test would be interesting. I am also of the opinion that the comfort factor will probably make you feel warmer even if science may well suggest that you're not. Silk or Flannel/Fleece next to my skin beats the heck out of an itchy wool blanket any day. I'm confident that my 220 x 200 cm commercial wool blanket with a decent camel wool percentage would outperform a lot of expensive sleeping bags, but the blanket is BIG and HEAVY.
Thanks @RobertsBulgaria. The liner used here was sold as 100% silk by a UK silk garment supplier so am pretty confident it is genuine. There are loads of cheapie nylon ones as you say knocking about in online marketplaces. For sure despite the minimal impact on insulation in the test I would also continue to use for comfort and easy washing purposes.
Test seems deeply flawed.. so much heat loss through the surface of the water. Every surface not covered by the test material should be covered by extremely effective insulation
Hi lu, disagree. Every cup has same volume of water and same area of surface water as well as being capped, so the same opportunity to lose heat through the surface. It also produces consistent results if repeated.
@@bigskies2202 the issue isn't with the control between tests but with the percentage calculation
Hi Lu, well appreciate the challenge. The only way things are ever improved is to question them. As the maths is just to compare the overall heat lost from the body of water and compare the differences for the differently insulated versions I still don't see deeply flawed (but is suppose thats a matter of definition). There is no assertion that all heat loss is through the isulative material just the relative performance of the cups insulated with different materials. I will run a little test with an insulated cap versus the uninsulated cap to get a firmer understanding of the difference.
@@bigskies2202 I guess in my first comment I misspoke - the results are fine considering the limitations of a home test, but the conclusions drawn aren't. Would be interesting to see the difference. Also you've got to consider that the liner creates extra air pockets 🤔 not drawn tight as in the test. The test is currently of the insulative value of the fabric - but not necessarily the liner used in practice. Gets complicated fast eh
Yeah for sure it's not straightforward. And the layering impact of tiny air gaps etc. certainly is hard to replicate. However have found the conclusion that a silk liner adds a tiny bit of warmth but the main value is in protecting the bag, comfort and being usable in itself in hot weather is pretty close to personal anecdotal experience, and that have heard from others. It's the manufacturer claims of significant extra warmth, e.g. an extra season that would question really. For that a thin fleece liner seems best.