I have had it off and on a couple of times now,,and just sewed a little nylon loop at the peak inside for hanging my glasses and a thermometer up inside to check on the temps I get using it...been hanging in 49-to 54 degree nites with it on with just my modified 50 degree Jarbidge UQ and a 50 TQ by UGO in shorts and tee only and comfy as all get out even with the doors open sometimes, playing with it,,keeping the very tops of the doors cracked for venting,,other nite at 49,,doors closed with these quilts being used and total toast..now that the thermometer can hang inside will see how the temps inside are compared to outside temps also. Its a perfect piece of gear for the Road Runner Bridge Hammock. I normally wear a light buff on my bald head in cooler and cold weather and have yet to wear it inside the Spindrift is so cosy.