After reading the BPL review, it appears that the JakPak still needs some development but I still think it has some potential.
The yellow JakPak that was reviewed was one of three models, the company also make a lighter nylon version and camouflage version. The yellow JakPak is made of polyester with a Urethane coating, This proved to be water proof but did not breath which made the jacket uncomfortable to wear while walking, the bivy also did not breath which made it clammy to sleep inside. It rained a few times while the reviewer was sleeping inside the JakPak and while he mostly stayed dry some water leaked it the join between the bivy and jacket which would make it not suitable for very wet climates.
The jacket was also not very comfortable to wear, even though there are some adjustments it was difficult to get right.
The reviewer suggested that the Jakpak was not suitable for backpacking, it was more suitable as cold wet climate hunting gear. The detailed review can be found on the
http://www.backpackinglight.comTony
There is no such thing as bad weather.....only bad clothing. Norwegian Proverb