I use the Spear Pea Pod with an simple gathered end hammock. It would not be possible to turn on my side. One reason that is not possible is the necessity of always breathing out side of the pea Pod to prevent condensation inside of it. Even with that, there is always condensation build up around my face on the pea Pod. Of course, this is at temperatures well below freezing, have not used it above the teens so far. But even with a little dampness, much prefer the pea Pod to other insulation options, it doesn't fail to keep me warm!