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Yes, the R-value will add of your different layers. If you wear layer A with R=5 and layer B with R=2.5, the overall insulation value will be R=7.5. To explain this a bit, we think of two layers or flat walls which interact only due to thermal conduction. This is just a model and in reality other effects will come in play. The Fourier Law for thermal ...


From looking at the pictures I would say that for the "default" conditions at summer glacier/alpine tours they should be perfectly fine. In dry but slightly coldish conditions they will give you good grip and rope handling, as long as you don't have to dig through snow with them. The reason why you have got cold fingers while cycling might be on the one ...


I don't have any hard evidence other than personal experience, but using poles with shock absorption tends to be easier on the joints - it cushions, at least a little bit, the jolting on your body, especially when going down steep terrain. With a standard pole, when it connects with the ground, that's it - your downward motion is halted immediately. With the ...


According to wikipedia2 In calculating the R-value of a multi-layered installation, the R-values of the individual layers are added. I would imagine a slight diminishing return as the r-value is a laboratory measurement in ideal condition which is not quite the same as on the field (variable temperatures, moisture, air movement, etc.).

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