As a former longtime BSA leader I still have a lot of my old tent camping gear and I love my Big Agness Echo Park 20 Degree above zero down bag as many of you know this bag has a built in sleave that a Thermarest self-inflating pad fits in the bottom of the bag. My Idea is to use Reflectix brand bubble Insulation which can be bought at Lowes or Home Depot or Amazon Etc. in 48"x 10' rolls for about $50 and cut it to a little wider than the width of my Thermarest and make a sleave/pouch at the foot end of the Reflectix and slide my Thermarest pad into it. This would solve the problem of trying to shove the Reflectix layer into the Big Agnes pad sleave. Then I would have the Insulation Value of the Thermarest Pad then the 97% Heat reflective properties of the Reflectix next to me only separated by the nylon sleeping pad sleave...In Theory the Reflectix pad would be like having 1/4 dead air space sandwiched between 2 mylar space blankets...I am thinking this combo should make things pretty toasty as I used my Big Agnes and Thermarest combo along with a Sea to Summit Reactor Sleeping Bag Liner (adds 14 Degrees to bag temp rating HIGHLY RECCOMENDED BTW) on a few 10 to 15 above zero winter Camporees my sleeping pad never slid out from under me AND I NEVER GOT COLD ... So maybe the addition of the Reflectix layer on top of the Thermarest would be a good replacement for a $$$$ BQ/TQ for a while... I think it should be a pretty good setup.... Please feel free to reply if you have tried this setup or have any other suggestions Thanks Hoosier 1957
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