FAK’s and Water?

The Adventure Medical method of using an Aloksak inside a zippered nylon pouch works well. I have another zippered pouch made by Eagle Creek that is like PU coated nylon mesh. That pouch and an Aloksak liner makes a great lightweight waterproof storage system. Note that the new BPL Firesteel and tinder kit comes in an Aloksak. The Sea to Summit Ultrasil stuff sacks are good for intermediate water protection. There too, an Aloksak makes it a very tough system for more critical items.

Ziplocks are better for organization than real waterproofing, IMHO. Use the freezer version, don't overload them and double up. Caveat emptor!

>Ziplocks are better for organization than real waterproofing, IMHO

Ziploc makes dry bags too.

http://www.wildernessdining.com/shopbybrand-ziploc.html

Brian, good questions for those of us who carry a variety of FA items.

"Do you view the interior contents as disposable items and plow through regardless of the weather?"
Yes, most supplies are cheap in bulk and my trips are short; but they are grouped in tiny ziplocks, so regardless of the weather they will remain dry. My external pouch is not, but it is inside my silnylon pack.

"Or do you shell your FAK in the latest fabrics? If so? What fabric do you recommend to keep the water out?"
I tried Aloksacs, but the single-rail zip tends to pull open when flexed, IME; I soaked a wallet, a camcorder, etc.. They haven't updated their sealing system in years, while other companies have continuously improved theirs.. Freezer Ziplocks with their double color/double seal have never leaked and I use them for larger items (although no longer in my aid kit because it is smaller now).
To hold my kit, I use a zip pouch I got at the $1 store, stacking pill cylinders (also $1), and added a laminated card with the "red cross" so others can easily identify the kit. Its heavy at 150grams, but having just the right medication on hand has relieved a lot of suffering; usually not my own. This is the kit I keep in my Every Day Carry bag to and from work.

"I've also been told Zip Lock's can be used but I'd be hesitant to use them as an exterior shell due to, what I perceive, a durability issue."
Slide a freezer ziplock into a similarly sized zippered nylon pouch and you have a system similar to Adventure Medical, and just as good.

Heres a couple pics of my current configuration..

and if you're interested, the contents:

Sam Francis wrote: "Ziploc makes dry bags too.

http://www.wildernessdining.com/shopbybrand-ziploc.html"

Good to know, but they are huge!

I know that with my 1st aid kit, it is in a silnylon bag made by OR. I carry it in a gallon ziploc freezer bag. Overkill? Maybe. But I'd rather have it dry. This winter I had my pack get soaked on the coast, and my kit was bone dry.
I replace the bag when it gets worn out looking (they are recyclable here.)

Bare Aloksaks. Very durable. Put it in a nylon stuff sack or use the Adventure Medical kit bag if you need more protection.

I use ziplock freezer bags. I then bag smaller items in smaller zip locks (not the freezer kind.) I replace the outside bag as needed (maybe every 2 trips or so.) Seems to work well for me, although I haven't done a submerge test.