Backcountry Forum
Backpacking & Hiking Gear

Backcountry Forum
Our long-time Sponsor - the leading source for ultralite/lightweight outdoor gear
 
 
 

Amazon.com
Backpacking Forums
---- Our Gear Store ----
The Lightweight Gear Store
 
 WINTER CAMPING 

Shelters
Bivy Bags
Sleeping Bags
Sleeping Pads
Snow Sports
Winter Kitchen

 SNOWSPORTS 

Snowshoes
Avalanche Gear
Skins
Hats, Gloves, & Gaiters
Accessories

 ULTRA-LIGHT 

Ultralight Backpacks
Ultralight Bivy Sacks
Ultralight Shelters
Ultralight Tarps
Ultralight Tents
Ultralight Raingear
Ultralight Stoves & Cookware
Ultralight Down Sleeping Bags
Ultralight Synthetic Sleep Bags
Ultralight Apparel


the Titanium Page
WM Extremelite Sleeping Bags

 CAMPING & HIKING 

Backpacks
Tents
Sleeping Bags
Hydration
Kitchen
Accessories

 CLIMBING 

Ropes & Cordage
Protection & Hardware
Carabiners & Quickdraws
Climbing Packs & Bags
Big Wall
Rescue & Industrial

 MEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 WOMEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 FOOTWEAR 

Men's Footwear
Women's Footwear

 CLEARANCE 

Backpacks
Mens Apparel
Womens Apparel
Climbing
Footwear
Accessories

 BRANDS 

Black Diamond
Granite Gear
La Sportiva
Osprey
Smartwool

 WAYS TO SHOP 

Sale
Clearance
Top Brands
All Brands

 Backpacking Equipment 

Shelters
BackPacks
Sleeping Bags
Water Treatment
Kitchen
Hydration
Climbing


 Backcountry Gear Clearance

Topic Options
Rate This Topic
#204145 - 03/10/20 10:21 PM Air Mattress and CC Foam Pad
Jim M Offline
member

Registered: 11/23/03
Posts: 354
Loc: Kitsap Peninsula, WA
I'm going winter camping in a couple of weeks. It will be at the limit of my sleeping bag comfort zone. We may be sleeping on snow. I plan to take my Big Agnes air Mattress and a closed cell foam pad like maybe my RidgeRest. The question is: do I put the RidgeRest on top of the air Mattress or the other way around. I am only interested in warmth, comfort either way will be acceptable to me.

The old theory was that air in an air mattress circulated cold air. But my new air mattress does have a small R rating and if it is on top of the CC Foam pad and covered by the sleeping bag where would the cold air come from? I have slept on snowand ice several times with just a 72" RidgeRest and was warm enough so I think it alone is pretty darn good insulation..
_________________________
Jim M

Top
#204146 - 03/11/20 11:19 AM Re: Air Mattress and CC Foam Pad [Re: Jim M]
BZH Offline
member

Registered: 01/26/11
Posts: 1030
Loc: Torrance, CA
Put the CC foam pad on top. I've consistently heard anecdotal evidence that it is warmer that way. What I think happens is this: you fill up the air mattress and by the time you go to bed, it has cooled off quite a bit. As a result, when you go to bed your body has to warm up the air in the mattress. Not very much air in the CC foam so it cools your body off less.

Top
#204148 - 03/11/20 10:24 PM Re: Air Mattress and CC Foam Pad [Re: BZH]
OregonMouse Offline
member

Registered: 02/03/06
Posts: 6728
Loc: Gateway to Columbia Gorge
About 10 years ago, I was out the last week of September when the nights went down to 15*F. Basically, a three-dog night with only one dog! I had a very inadequate air mattress and a 1/8" thick Gossamer Gear foam pad. While either way (foam on top or foam underneath) was cold, it was slightly less frigid with the foam on top.
_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey

Top
#204149 - 03/12/20 04:30 PM Re: Air Mattress and CC Foam Pad [Re: Jim M]
Rick_D Offline
member

Registered: 01/06/02
Posts: 2895
Loc: NorCal
What kind of air mattress? BA has both plain and insulated versions.

I would tend to put the foam on the bottom and the mattress atop it. My thinking is you will have a barrier at ground level and convection heat loss from the mattress would be mostly limited to the edges. If you flip the order then the mattress is free to conduct heat to the ground across its full area. I think it will also be easier to tweak the mattress volume for comfort when it's on top.

There could be an issue of them slipping against each other, but that you can experiment with to find out. Some mattresses have anti-slip bottoms.

My $0.02.
_________________________
--Rick

Top

Shout Box

Highest Quality Lightweight Down Sleeping Bags
 
Western Mountaineering Sleeping Bags
 
Lite Gear Talk - Featured Topics
Treat yourself: WM FlyLite limited edition
by Rick_D
07/20/20 01:15 PM
Need advice on summer sleeping bag for backpacking
by Daniel Phill
01/08/20 04:16 AM
Backcountry Discussion - Featured Topics
Thunderstorm Strategy
by SJS
07/22/20 05:13 PM
Hot Weather Hiking Shirt
by SJS
07/15/20 05:02 PM
Make Your Own Gear - Featured Topics
Featured Photos
Breakneck Ridge, New York
May 2012 Eclipse, Lassen Park
New Years Eve 2011
Trip Report with Photos
Seven Devils, Idaho
Oat Hill Mine Trail 2012
Dark Canyon - Utah
Who's Online
1 registered (), 40 Guests and 0 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
RFAgricultur, gaurav kumar, JaguarKarol, genemtravels, Eddie651
12890 Registered Users
Forum Links
Disclaimer
Policies
Site Links
Backpacking.net
Lightweight Gear Store
Backpacking Book Store
Lightweight Zone
Hiking Essentials

Our long-time Sponsor, BackcountryGear.com - The leading source for ultralite/lightweight outdoor gear:

Backcountry Forum
 

Affiliate Disclaimer: This forum is an affiliate of BackcountryGear.com, Amazon.com, R.E.I. and others. The product links herein are linked to their sites. If you follow these links to make a purchase, we may get a small commission. This is our only source of support for these forums. Thanks.!
 
 

Since 1996 - the Original Backcountry Forum
Copyright © The Lightweight Backpacker & BackcountryForum