by Alpinisto » Wed Mar 25, 2009 11:47 pm
Dingus Milktoast wrote:Are they high?
Dingus Milktoast wrote:At a 'unert fitty this pad is permanently out of my price range. Not even when the market rejects it and Sierra Trading Post sells off the liquidation will I be able to afford this pad.
Its too expensive at half the price. Sheesh!
by montana boy » Thu Mar 26, 2009 12:38 am
by rhyang » Thu Mar 26, 2009 2:15 am
by haivanhuynh » Thu Mar 26, 2009 4:17 am
by norco17 » Thu Mar 26, 2009 6:26 am
haivanhuynh wrote:I might give it a try simply for the amazing bionic lime color. It will be my first foray away from closed celled foam.
For certain though, I will replace my much used orange z-lite with a new lime one.
How 'bout a new color for my ridgerest deluxe?
(I hate how marketing is so effective with me)
by Mike Swiz » Thu Mar 26, 2009 2:34 pm
haivanhuynh wrote:I might give it a try simply for the amazing bionic lime color. It will be my first foray away from closed celled foam.
For certain though, I will replace my much used orange z-lite with a new lime one.
How 'bout a new color for my ridgerest deluxe?
(I hate how marketing is so effective with me)
by kozman18 » Thu Mar 26, 2009 4:56 pm
by nartreb » Thu Mar 26, 2009 5:23 pm
by Buz Groshong » Thu Mar 26, 2009 5:25 pm
A 14oz. full length air mattress with no insulation that claims unrivaled warmth? That's what Therm-a-Rest is saying about their new lightest inflatable ever.
by nartreb » Thu Mar 26, 2009 5:39 pm
by dskoon » Thu Mar 26, 2009 5:57 pm
Buz Groshong wrote:Goldenhopper wrote:A 14oz. full length air mattress with no insulation that claims unrivaled warmth? That's what Therm-a-Rest is saying about their new lightest inflatable ever.
A few words about insulation and heat flow for the skeptics.
An air mattress doesn't need insulation in it, the air is the insulation.
When you put insulation in the attic or walls of your house, you want something that is fairly non-conductive and that will stop convective air currents so that the air spaces will be effective insulation. Convective air currents generally transfer heat upward, and never transfer heat downward, so there is no need to be concerned about them for a sleeping pad.
There's nothing that you could put in an air mattress that would improve it's insulation (on cold ground) other than replacing the air with an inert gas. Of course, a vacuum would be better insulation than an inert gas, but have you ever tried to inflate something with a vacuum?
by norco17 » Thu Mar 26, 2009 6:48 pm
Buz Groshong wrote:Goldenhopper wrote:A 14oz. full length air mattress with no insulation that claims unrivaled warmth? That's what Therm-a-Rest is saying about their new lightest inflatable ever.
A few words about insulation and heat flow for the skeptics.
An air mattress doesn't need insulation in it, the air is the insulation.
When you put insulation in the attic or walls of your house, you want something that is fairly non-conductive and that will stop convective air currents so that the air spaces will be effective insulation. Convective air currents generally transfer heat upward, and never transfer heat downward, so there is no need to be concerned about them for a sleeping pad.
There's nothing that you could put in an air mattress that would improve it's insulation (on cold ground) other than replacing the air with an inert gas. Of course, a vacuum would be better insulation than an inert gas, but have you ever tried to inflate something with a vacuum?
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