Hey Dirtwheels,
yes, we use the Nano 7. I am 5'10" 170lbs. We are trying to find the lightest weight, compact, waterproof, breathable, lowest temp, 4-season, quick set-up/ take-down. I really like the idea of a WPB hammock sock, but they are roomy and bulky. So, we went with the eVent WPB fabric of the ID South Col II Bivy. That bivy works great with the armholes in conjunction with the Exped Wallcreeper. I love being able to stick my arms out and access items without unzipping yourself out. Again, it's all about compact and lightweight using a smart use of different layered fabrics/insulation to achieve the lowered temps. This is really accomplished by making/adding the "sleeves" for the ends of the bivys. You have to have a completely enclosed cocoon to hold in your heat in low temps. So, I sewed up some sleeves using grey 3-Layer WPB eVent fabric and Marpat 3-Layer WPB Military Gore-Tex (Rockywoods.com). Then I cut the ends of the ID South Col II eVent Bivys and sewed on the sleeves with drawstring ends for around the ENO Atlas tree straps. Did the same thing with the SOL Escape Thermal Bivvy... I used some Tyvek material and made the sleeves. Then I cut the ends of the SOL Escape Bivvy and sewed on the sleeves with drawstring ends. You can see from the pics in my post how I layered the system. Anyways, the thermal bag is really nice as it wraps around you and works best against the body. But, I didn't want to just lay on the aluminum/reflective material in the hammock and wanted it to cocoon around me for maximum potential.
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