I’ve been using Mountain Laurel Designs’ bug bivy for a little over a year now, and finding it to be an essential piece of my sleeping and shelter kit in spring and summer. I’ve used tarps for shelter for years, but it seems every year that the Maine black flies and mosquitoes have gotten worse and worse, making for several sleepless nights in the backcountry a few years ago. While the 7.3 oz (including cords) bivy offsets a lot of the weight savings from using an open tarp for shelter rather than an enclosed tent, I’ve found it well worth the extra weight.
The design is simple– a silnylon floor is connected to a no-see-um netting top, with a half-length zipper at the peak for entry. Grosgrain loops at the four corners allow for staking the bivy out, and two more loops at either end of the zipper can be used to hang the bivy from my tarp, or from lean-tos and shelters on the Appalachian Trail. There’s not much space in the bivy, but there’s enough that I can lay on my stomach, propped up on my elbows in order to read before going to sleep.
Setting up the bivy took some getting used to as well, but the learning curve is low. I stake out all the corners so the bivy is taut, then put my sleeping pad and sleeping bag in. I keep my little things (journal, headlamp, maps, and bag of extra things) next to my head inside the bivy. Once I’m ready to climb in for the night, I attach the hanging loops from the top of the bivy to hang loops on my tarp with a pair of stretch cords with plastic hooks (included with the bivy). I’ve placed cord locks at the bivy end of the stretch cord so that I can quickly adjust the tension of the hang before calling it a night. I still have to be careful when getting into the bivy, since it seems to attract dirt and leaves that I accidentally kick onto it, but you can avoid that with a little mindfulness.
The floor of the bivy is waterproof, but in cases where I expect very wet conditions, I’ll add 1.7 ounces with a Gossamer Gear polycryo ground cloth underneath the bivy.
In AT shelters, where staking the bivy to the ground would be a bad idea, I keep my heaviest items at the corners of the bivy in order to keep it weighted to the ground (not as sturdy as stakes, but it works well enough), and attach the hang cords to either hanging nails in the shelter, or I might gently wedge a stake between the logs of the shelter to make a hanging hook.
So far, the bivy has been worth its weight in gold, allowing me to sleep like a baby under my tarp or in shelters next to swampy ponds in Maine. Take that, mosquitoes and black flies!
MLD builds these to order, with wait times in the order of several weeks, so it might be too late to order yours for this year, but put it on your list for the next holiday season.
Disclosure: This bug bivy was a Christmas gift from a family member, purchased at full price from Mountain Laurel Designs.