Gordon wanted everyone to be aware of this.
Sports Authority is selling Dri Duck raingear. He used this on the KST backpack. They are light at 5 ozs for the hooded jacket and also comes with a rain pant. It can roll up to the size of a fist and easily fit in a camelbak or vest for cold night runs. They go for about $20.00. They are waterproof and breathable too.
Check it out. This sounds like a good deal to me.