AnswerID: 96391 Submitted: Thursday, Feb 03, 2005 at 07:06
Member - Chrispy (NSW)
replied:
Like anything, there are "self-inflating" mattresses and there are "self-inflating" mattresses.
We have had a lot over the years, and find that (if you go down this route) that only the better-quality ones (usually American) perform. We have found that the Therm-a-Rest are usually the best for three reasons:
1) They actually self-inflate to full (at least for a few years of use). Be aware that if you have to actually blow into an air mattress (especially during a
cold-winter camp) you get a lot of moisture form your breath into the mattress, and this condenses to a liquid - even in small amounts. Given this, you eventually get internal mould - and other nasty growths. The high-quality mattresses suck their own air in without help and stay nice and dry - and clean.
2) The cheaper units (like the blue and green ones from
places like Great Outdoors) do not have the same internal construction and the more expensive units. In the better units, the actual foam layers are logitudinally bonded to the inside surface of the outer layer (the "bag"). This means that there is no "puffing up" of the mattress if you over-inflate just a little. We have taken our cheaper mattresses back after a single use because the outer and inners are independent and let the outer layer bag out with both of us sleeping - leading to a rolly-poly sleeping experience. It's easy enough to let a little air out to compensate, but it's then a case of the old shoulders-on-the-ground comfort problem. Stay with the better units and the inner and outer stay together, so no matter how much air is in them, they do not let more air down to the end of the bed that has no weight (you) on it.
3) The more expensive units roll up smaller - because they don't have to be so thick to begin with. We have our hiking Therm-a-Rests that are only 1" thich inflated (but are still very comfortable once your weight is distributed on them) and roll down to a tight roll that is only about 4" in diameter. Our cheaper ones only used to roll down to a foot in diameter - taking up half the rear seat.
Phew!....
Cheers
Chris
 | '00 Land Rover Defender TD5
'96 Mitsubishi Delica 2.8TD
'95 Nissan Patrol GQ TD42T
'91 Nissan Patrol GQ RB-30
Our property: http://www.omaroo.net |
Reply 11 of 17