Rating: 5 / 5
I've finally found my perfect bivy for use with a tarp. This bivy weighs 7 ounces, and features a nylon DWR top, a silnylon bottom, a waist-length side-entry zipper, and a true innovation: a drawstring opening at the foot. It's cool because it's highly breathable, perfect for summers around here (Ohio), turns the spatters and mist that drift under my tarp, and resists the dew that sometimes forms when I sleep under the stars. The drawstring bottom allows extra ventilation on those summer nights, and works well with my WM Mitylite bag (which has a two-way zipper to ventilate the foot area.) There is no bug mesh panel over the face - but I've started carrying the Gossamer Gear bug canopy, which I can either pitch from a tree limb or just lay across my face. Also, Ron Bell is extremely responsive and helpful - he's currently sewing a poncho for me, and has been very patient as I've changed my mind (with much useful guidance from him) about six times.
I highly recommend the product and Ron Bell - both are class acts.
7/9/07: Although I no longer use this bivy, I'm not changing my rating. I quit using it because it lacked a built-in mesh panel, and I got frustrated with the Gossamer Gear bug canopy - a real pain to use. (I now use an Integral Designs Salathe when I'm not using my Big Agnes Seedhouse SL1 tent.) If a mesh panel is really important to you, this bivy is not what you want - though Ron would probably be willing to modify one for you as a special order; like I said, he's a class act.