Breathability Discussion

[Youngblood]

Complicated subjects require complicated explanations. This one is well done. Congratulations.
I found that just reading it left me confused but taking the time to study it was well worth the effort. Thanks for making the effort to share it.

Thanks Bob.

[Tobit]

I have a very tough time with pads in hammocks from the testing I've done. So much so, I refuse to use them. Maybe it's because I'm such a big guy but, when using a pad in a double layer hammock such as my DD, the top layer of the hammock sticks to the pad and the top bunches up and doesn't conform to my body properly. Maybe I'm doing something wrong, I don't know but I just can't get a comfortable hang with a pad in the pocket.

[Peter_pan]

just curious pan, since it seems you are dead set against using a pad,

what do you do, or suggest others do, when they are at the bottom end or below their jrb quilts comfort range?

WBG,

I'm not dead against using a pad..... I'm against using wide, full length wrapping pads as a back sweater. YMMV...

JRB make 18 models ouf quilts with conservative temp ranges down to zero, with the new Mt Washinton UQ..... Just as one top bag does not do well for the year round camper the same is true of quilts... A great gear locker will have multiple UQ for multiple seasons IMHO (remember I'm biased).... So my preferred answer to your question is select a quilt for the expected range.

Alternatively many folk have JRB top and under quilts, since the corner tabs and side ladder loops align they may be stacked if heading out for that occasional winter hang then use an existing bag for the top.

In a pinch if weather is worse than expected, a sit pad under the butt/hip area will add a lot with minimum to no sweat issues.

Pan

[Peter_pan]

I sleep on a non breathable, insulated air mat year round. It's just as nonbreathable as a ccf pad.
Having a layer of fabric between me & the air mat helps take care of dispersing perspiration.

Slowhike, et al,

A Dam style infatable has tubes which form valleys which, as others have noted seem to help disapate the sweat/nonsensible sweat issues... Thus while it is a non breathavle material it has some vent like breathability....Yours is a tube type, right?

Pan

[Peter_pan]

A second question for Peter_Pan - you have explained in the past that you tried using pads in the hammock, but for various reason they didn't work for you.

Did you ever try using one under the hammock instead of in the hammock?

I notice that your BMBH is double layer for a pad - the sensible way to use a pad in my experience, instead of laying directly on the pad itself. Like slowhike's experience

TiredFeet,

Yes I have tried pads below the hammock......

I do agree that if one desires to use a pad; it is easier, less hassle and agruably better if it is below or in a "double bottom".

The JRB Bear Mountain Bridge Hammock has a built in pad pocket that will accept full length pads up to 26 inched wide and 2 inches thick.... It also has under quilt attachment loops... These features are provided to allow the users to chose whichever approach they desire.

Pan

[warbonnetguy]

WBG,



JRB make 18 models ouf quilts with conservative temp ranges down to zero,

Pan

Pan,

i don't see any temp ranges for your uq's anywhere on your site, can you point me to them, because i'd love to look at them.

[slowhike]

Slowhike, et al,

A Dam style infatable has tubes which form valleys which, as others have noted seem to help disapate the sweat/nonsensible sweat issues... Thus while it is a non breathavle material it has some vent like breathability....Yours is a tube type, right?

Pan

Yep, that's correct. But I did use a ccf pad for a while before discovering the insulated inflatables.
I don't remember having any major sweating issues w/ the ccf pads but then I used thoughtfulness in how I adjusted everything for a comfortable sleeping temperature... adding & taking away as I needed.

The insulated inflatables are just more comfortable (though they require some effort to inflate), but if temps are likely to be very cold (say down into the 30s) I like to use an under quilt also.
I could get away w/o the under quilt sometimes, but it's just so NICE & WARM<G>.

[Youngblood]

Slowhike, et al,

A Dam style infatable has tubes which form valleys which, as others have noted seem to help disapate the sweat/nonsensible sweat issues... Thus while it is a non breathavle material it has some vent like breathability....Yours is a tube type, right?

Pan

The tubes in DAMs are due to the internal baffles that help it keep its shape. Those valleys disappear under you body when you lay on the DAM and it compresses some. If they didn't compress the DAM would be hard and not very comfortable; also any vents caused by valleys would circumvent the conductive insulation the DAMs provide and they wouldn't keep you very warm. DAMs provide a lot of insulation.

I have known people that don't use them in moderate conditions in hammocks because they overheat and sweat when they use them in moderate conditions. In moderate conditions they may switch to uninsulated air mats or insulated air mats that aren't as warm as their DAM and are more comfortable in moderate conditions.

[slowhike]

The tubes in DAMs are due to the internal baffles that help it keep its shape. Those valleys disappear under you body when you lay on the DAM and it compresses some. If they didn't compress the DAM would be hard and not very comfortable; also any vents caused by valleys would circumvent the conductive insulation the DAMs provide and they wouldn't keep you very warm. DAMs provide a lot of insulation.

This is true. I believe the fabric like outer cover of the DAM, along w/ clothing, help w/ dispersing perspiration.
The wicking type clothing help in the same way when you use a ccf pad, & if you use a Segmented Pad Extender (SPE) that helps even more to disperse any perspiration.

[tomsawyer222]

I dont see a MT washington quilt on the Jacks site?