{"id":2638,"date":"2016-09-16T17:08:44","date_gmt":"2016-09-16T14:08:44","guid":{"rendered":"https:\/\/gerald-zojer.com\/blog\/?p=2638"},"modified":"2020-09-04T17:55:03","modified_gmt":"2020-09-04T14:55:03","slug":"simple-diy-bivy-bag-windproof-and-water-repellent-with-patterns","status":"publish","type":"post","link":"https:\/\/gerald-zojer.com\/blog\/simple-diy-bivy-bag-windproof-and-water-repellent-with-patterns\/","title":{"rendered":"Simple DIY Bivy Bag – Windproof and Water-Repellent – With Patterns"},"content":{"rendered":"
\"bivy<\/a>
DIY bivy bag II<\/figcaption><\/figure>\n

While I do have a great bivy bag as a solo shelter, for sleeping in a tarp I made another simple bivy bag, which should serve my sleeping bag as an additional layer to become windproof and water-repellent (e.g. from condensation water under the tarp). In this post I explain from what materials I made it, and some instructions on how to make it, including my patterns.<\/p>\n

Why another bivy bag?<\/h1>\n

Already two years ago I made myself kind of a hybrid of a bivy bag and a person tent<\/a>. I am quite satisfied with it, and love it for solo trips, particularly in winter time. Yet, I am still experimenting with different types of shelters for my hiking and skiing trips, and thus made myself a tarp<\/a> this autumn. However, the tarp does not entirely keep out wind, and my regular three season sleeping bag is not windproof either. Thus I decided to also make a very simple bivy bag. This new bivy should be an additional layer of protection for my sleeping bag against wind, humidity, or condensation water inside the tarp, but remain very breathable. Moreover it should also be much lighter than the spacious bivy I made before. According to these specifications I wanted to use a windproof and water-repellent material (like, for example, Pertex\u00ae Endurance<\/a>), but of course the patterns could also be used with a waterproof fabric.<\/p>\n

Bivy Bag Concept<\/h1>\n

The form I made is thus a very simple one, as it is basically is just supposed to be a cover for my sleeping bag. I only took a piece of fabric, slightly cut it according to my needs (see pattern below), and sewed it together like a tunnel. I added some additional material for the upper part to make it wider, and attached a water-repellent zipper (YKK Aquaguard).<\/p>\n

The shape of the pattern is supposed to fit the mummy shape of my sleeping bag. While the lower\/feet part is symmetric, the idea was that at the part for the upper body – the conic shape – should be asymmetric. The idea was, to have the zipper not exactly on the side of the bivy, but to get it slightly on top of me when laying inside. I was thinking that this shape would make it more convenient to get in & out of the bivy.<\/p>\n

\"bivy<\/a>
DIY Bivy bag on ground sheet and mattress.<\/figcaption><\/figure>\n
\"bivy<\/a>
Widening of bivy on upper body part, and zippers<\/figcaption><\/figure>\n

Material List<\/h1>\n