Bivy help

Hum, never had much of a problem. I've used a nylon bivy for years and never had a problem. I wonder if the bivy on top of the ground cloth is the culprit. Maybe try just one and see how slippery it is.

I never had much of a problem with that, but I keep the pad inside the bivy and do not use a ground sheet.

Put some dots or thin lines of silicone sealant on the bottom of the bivy. It's tacky. Or are you sliding around INSIDE the bivy? (Then put dots on the inside, too.)

+1 on applying silicone sealant.

If you mix in some white gas, it will thin the silicone sealant, which makes it easier to apply and is not so "heavy".

If you move to a regular bivy with a silnylon floor or something like that, you can skip the polycro sheet.

I have a feeling that maybe you are sliding on the polycro sheet vs. inside your bivy.

Eliminating the ground sheet can solve that problem if you have a bivy that has a waterproof floor/bottom.

-Tony

I turn perhaps 8 or 9 times in one night and have the same problem with my NeoAir inside my MLD bivy. Sometimes I wake up with the Neoair on top of my sleeping bag.

The simplest solution
Inspect ground carefully
Put Neoair on the ground
Put bivy on top of the Neoair

If you like the polycro and can tolerate the weight, put the polycro under the neoair.

I tried some dots of silicon seal and did not see a material difference.Perhaps I did not use enough.