Jay Ham's Cut Down Thermarest
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 D G (DanG) Locale: Pacific Northwet Jay Ham's Cut Down Thermarest on 06/28/2005 12:22:43 MDT The recent canyon trip photo report mentions that Jay had a sub 10 oz cut down thermarest pad. I'm wondering if Jay or anybody who has tried this could elaborate on the technique for doing the mod. I would imagine you would just cut the pad down leaving some of the surface material and gluing that down again with something like epoxy or contact cement?Dan
 paul johnson (pj) - F Locale: LazyBoy in my Den - miss the forest Re: Jay Ham's Cut Down Thermarest on 06/28/2005 12:43:08 MDT I have a thermarest ridgeRest pad that i used to use with my GoLite Breeze.Simply cut it down to the desired length to reduce the weight by cutting the desired number of inches off of the foot end of the pad by cutting straight across the pad. The "cut-down" is not a vertical/thickness cut-down. It is a length cut-down.Furthermore, you could also reduce the wt. a little bit further, by cutting a "mummy" type of shape off of the remaining rectangular pad. That is, cut the four rectangular corners off the remaining pad, which was just previously cut-down to a shorter length, by making angular cuts. I know this description is NOT very clear, so go to the POE website & look at their pads - they come mfr'd with that "mummy" cut shape.You can weight the end result (the best way to determine the wt) or if you leave it in a rectangular, non-mummy shape, it's a simple linear calculation to calculate the wt. of the cut down pad. e.g., using a standard ridgerest's published figure14oz*new-length-in-inches/72inches =new wt.conversely, you could work the equation backwards, picking a new "target" wt & then solve the equation algebraicly for the "new length". Edited by pj on 06/28/2005 12:44:30 MDT.
 Richard Nelridge (naturephoto1) - M Locale: Eastern Pennsylvania Bozeman Mountain Works TorsoLite (TM) Inflatable Sleeping Pad on 06/28/2005 13:02:06 MDT According to the article, Jay had cut down and old style Therm-a-Rest UltraLight 3/4. Isn't the 10 oz BMW TorsoLite sold on BPL (www.backpackinglight.com/cgi-bin/backpackinglight/torsolite_inflatable_sleeping_pad.html?id=XbWVX8pm:12.75.221.190) almost the equivalent to a self inflating Thermarest Matress with a surface and inner foam similar to the older UltraLight (instead of the newer Prolite 3 and 4)? Though presently out of stock, a members price of \$58.79, and if you can deal with the 32" length this may be the way to go. Edited by naturephoto1 on 06/28/2005 13:13:32 MDT.
 D G (DanG) Locale: Pacific Northwet Cut down pads on 06/28/2005 13:18:39 MDT I had a ridge rest but just couldn't get comfortable on it (or foam pads in general). I just recently purchased the torsolite pad and have used it a couple of times. I also have a prolite 3 Short. The Torsolite is comfortable and compared to the thermarest seems more durable (shell material) and the foam firmer, probably due to the less aggressive die cut foam compared to the thermarest.However, the 3/4 length thermarest is only 3 oz heavier than the torsolite but considerably larger. On a "per length basis" it's lighter (and I would imagine less durable and colder).Still, I was thinking a prolite 3 cut down to the torsolite's dimensions would be a bit lighter, maybe in the 8 oz range.CheersDan
 Richard Nelridge (naturephoto1) - M Locale: Eastern Pennsylvania Cut down pads on 06/28/2005 13:40:42 MDT Hi Dan,Personally in a previous generation of the 3/4 Ultralight Thermarest, I found the pad a little uncomfortable due to the thickness (1"). That is partly why I purchased a Prolite 4 3/4 length Thermarest. The Prolite 4 3/4 is thicker (1 1/2") and more comfortable, (but another 3 oz heavier) than the Prolite 3 3/4.You are correct about the surface of the newer Prolite Series are not as rugged and because of the more aggressive die cut foam of the Prolite 3 and 4 are not as firm or as warm (have a lower R value) as the older Ultralight and Guidelight Pads that they replaced. Another reason I had purchased the Prolite 4 3/4 when the Ultralight 3/4 were being cleared out was it was 1 oz heavier, thicker with what may have been a higher R value than the Ultralight. Edited by naturephoto1 on 06/28/2005 13:55:03 MDT.