Joined
·
13,619 Posts
- Reaction score
- 2,046
""breathable" fabrics work only when the outside ambient humidity is far less than the humid interior."
Well, yes. But that should be clarified. They work when there is higher vapor pressure inside your suit, than there is outside. Since the human exterior, your skin, tends to be dumping the heat load from a 98.6F body, that means the temperature 'inside' your suit may be 90F and if it is only 85F on deck in the ambient rain...your body heat will still drive out the moisture, keeping your drier with a GoreTex suit than without.
Conversely, if you sit on a heated car seat after getting in from the rain, the heated seat will drive the rain back IN through your GoreTex. Nasty surprise, that. Good thing there are no heated helm seats to worry about on sailboats!
Given the choice between my old top-brand foulies and my camping GoreTex? I'll take the GoreTex every time until it gets chilly out. And even, sometimes. To paraphrase Galileo, "Nevertheless, it works!"
And if it wears out? Gore will replace the garments, free of charge, under warranty. Can't complain about wearing out with that policy, either. Other "breatheables" and water repellants? You'd have to tackle case by case, they're not all the same.
Well, yes. But that should be clarified. They work when there is higher vapor pressure inside your suit, than there is outside. Since the human exterior, your skin, tends to be dumping the heat load from a 98.6F body, that means the temperature 'inside' your suit may be 90F and if it is only 85F on deck in the ambient rain...your body heat will still drive out the moisture, keeping your drier with a GoreTex suit than without.
Conversely, if you sit on a heated car seat after getting in from the rain, the heated seat will drive the rain back IN through your GoreTex. Nasty surprise, that. Good thing there are no heated helm seats to worry about on sailboats!
Given the choice between my old top-brand foulies and my camping GoreTex? I'll take the GoreTex every time until it gets chilly out. And even, sometimes. To paraphrase Galileo, "Nevertheless, it works!"
And if it wears out? Gore will replace the garments, free of charge, under warranty. Can't complain about wearing out with that policy, either. Other "breatheables" and water repellants? You'd have to tackle case by case, they're not all the same.