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Perfect bivy?
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Timo Anttalainen

Locale: Finland, Espoo
Perfect bivy? on 10/26/2009 14:52:31 MDT Print View

Perfect myog bivy?

I made one bivy and it's almoust perfect but...

Silnylon floor and quantum top. No zip, just "hole" in shoulders.

+It is easy to make
+It is ultralight

-Silnylon is slippery
-It is no easy to go in
-I don like the hood, i wake up when quantum touch my face

So what is perfect ?

I was thinking if bivy is same desing as sleepinbag whitout zipper. Bugnetting over face (not removable). To get inside there is a hole in bottom of bivy, head to hip and one or two velcro to close it. I can draw picture if needed.

Is this idea crazy or good?

(sorry my bad english, i do not write very well)

Troy Ammons
(tammons) - F - MLife
Not crazy on 10/26/2009 15:07:52 MDT Print View

I made one sort of like that. Basically a tyvek tube, split down the left side with an overlap. The long top part goes up to about your neck. The head part is the tent type and extends down a bit for coverage., planned to be held up by 2 stadium ballons. That works.
It too is split on the left side about 12" with some velcro tabs.

I never figured out the netting, but velcroed on for sure.

I stopped when I realized it was not big enough to get my neoair in, now that I have a quilt. Neat thing about tyvek is you can just glue it together.

The next one will be a tyvek top and a cuben tub.

I might try to do a sketchup of it and post.

Edited by tammons on 10/26/2009 15:09:47 MDT.

Timo Anttalainen

Locale: Finland, Espoo
picture on 10/26/2009 15:29:39 MDT Print View


Diplomatic Mike

Locale: Under a bush in Scotland
Re : perfect bivvy on 10/26/2009 15:36:40 MDT Print View

Maybe i'm missing something, but the base wouldn't be waterproof.

Timo Anttalainen

Locale: Finland, Espoo
bivy materials on 10/26/2009 16:10:04 MDT Print View

Top: quantum or similar.
Bottom: Silnylon or cuben.

I don't sleep on too wet palaces, so holes in to bivy bottom is okay. Pad is outside of bivy.

Timo Anttalainen

Locale: Finland, Espoo
More pictures... on 10/26/2009 17:43:13 MDT Print View

I try to draw picture, but i make things not draw things... Perhaps this picture says more than 100 words.2 bivy

Diplomatic Mike

Locale: Under a bush in Scotland
Re : perfect bivvy on 10/26/2009 17:47:36 MDT Print View

Why not put the opening on the top?

Larry Dyer
(veriest1) - F

Locale: Texas
Top Opening on 10/27/2009 00:39:42 MDT Print View

Yeah, seems like it'd be hard to get into the sleeping bag with the bivy entrance on the bottom.

Lucas Boyer
(jhawkwx) - MLife

Locale: 38.97˚N, 95.26˚W
fwiw on 10/27/2009 07:54:39 MDT Print View

This reminds me of a quilt-inspired bivy, with the velcro holding the bottom together. Getting in would be best accomplished by sitting on pad and sliding bivy onto feet and climbing in. Getting out for a midnight call of nature might prove cumbersome. As one who struggles w/ tent zippers sometimes at night, I don't think I would go this route. How about a flip top with Quantum/Mesh flaps secured with velcro. If weather/bugs cooperate just sleep w/ flaps open. Getting in and out would be similar to your exisiting draw cord bivy minus the draw cord.

Troy Ammons
(tammons) - F - MLife
Perfect bivy on 10/27/2009 07:57:15 MDT Print View

The slit should go on the side IMO with a tub floor.

Edited by tammons on 10/27/2009 07:58:35 MDT.

Steven Evans
(Steve_Evans) - MLife

Locale: Canada
Re: Perfect bivy on 10/27/2009 08:15:08 MDT Print View

Hey Timo,
Everyones idea of what the perfect bivy is will be different. I like your idea, but like others think the slit should be on the top - of course you are welcome to make it however you like.

I have been toying with the idea of a center zip bivy for a while now. i have the material on hand, just never got around to making it. I think they would be easier to get in and out of.

Let us know how yours works out.

John Brochu
(JohnnyBgood4) - F

Locale: New Hampshire
re: "Perfect bivy?" on 10/27/2009 08:35:13 MDT Print View

Since you asked, my idea of a perfect bivy:

* 1.5 ounce/yard cuben fiber bathtub floor for total waterproofness without the need for a groundcloth.

* Whatever highly breathable water resistant top is lightest

* half zipper for easy entry

* full bug hood similar to tigoat ptarmigan

I'm guessing it would come in at 7.5 ounces or so.

Edited by JohnnyBgood4 on 10/27/2009 08:37:03 MDT.

Keith Selbo
(herman666) - F - M

Locale: Northern Virginia
rain on 10/27/2009 19:30:10 MDT Print View

How do you prevent rain from coming through the mesh?