Timeline for How do membrane-based boots breathe?
Current License: CC BY-SA 3.0
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| Apr 13, 2017 at 12:48 | history | edited | CommunityBot |
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| Mar 16, 2015 at 8:48 | vote | accept | Vorac | ||
| Mar 14, 2015 at 0:28 | comment | added | user5330 | @Liam: Once the DWR is gone - with boots, about a 30 seconds walking though wet grass, the vapor pressure on the outside of the Goretex is so close to the inside the amount of vapor passing through the Goretex is negligible compared to the amount of vapour a foot produces. SO we are both right - yes it does still breath, but not enough to make a difference. | |
| Mar 13, 2015 at 10:52 | history | edited | user2766 | CC BY-SA 3.0 |
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| Mar 13, 2015 at 10:51 | comment | added | user2766 | I'm likely simplifying @Pepi :) That's how it's shown on Goretex diagrams. I'm sure it's more complicated than that. I believe it has to do with the temperature of the water and therefore how gaseous it is. | |
| Mar 13, 2015 at 10:46 | comment | added | Pepi | "special funnel shaped holes that allow water out but not in." I'm impressed, I didn't know WL Gore got Maxwell's Demon to work for them. | |
| Mar 13, 2015 at 9:22 | comment | added | user2766 | That's not entirely true, it won't breath as well your correct but it should still breath. The DWR is there to keep the moisture from cooling the goretex layer, not to keep the moisture out of the holes as you might expect. That's because an important part of the breathability is the temperature gradient between the outside and the inside. So the indside needs to be warmer than the outside. This is less of an issue with boots than it is with clothing. So the DWR is less important | |
| Mar 12, 2015 at 22:39 | comment | added | user5330 | Importantly once the outside fabric of the boot is wet through (as opposed to water beading up and running off) , it will not breath. | |
| Mar 12, 2015 at 15:05 | history | edited | Benedikt Bauer | CC BY-SA 3.0 |
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| Mar 12, 2015 at 13:39 | history | edited | user2766 | CC BY-SA 3.0 |
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| Mar 12, 2015 at 13:33 | history | answered | user2766 | CC BY-SA 3.0 |