I had the surplus version too. Comfort will be determined by what your wearing. A woolen layering system is going to feel better than some summer shirt ( Hint- they're from Sweden.) Get a good leather dressing and not silicone. Silicone makes things nice and shiny, is water repellant and prematurely chews up leather. A quality saddle butter like Skidmores, Lexol etc is best.There are also canvas waterproofings used by packers for tents and tarps. Or, you can easily sew up a waterproof pack cover like a bottom fitted sheet or invest in the oversized ponchos that will drape over a pack. I like to let my packs breath a little, slows down condensation and mildew inside. But I have to wonder. If equipment is soaking wet, what kind of shape is the bearer? Are we talking comfort and survival or some goofball contest run by a T.V. bobblehead? There comes a time when you makecamp, crawl under your shelter and brew up your favourite hot drink and listen to the rain.