That’s a tough one. It sounds as if whatever you take is going to have the crap beaten out of it, so I agree it probably doesn’t makes sense to get the highest-price stuff out there. Moreover, your weather exposure will likely be greatest when you’re in the boat, so to some degree that eliminates the need to get all hyper about “breathability.”
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Up in Alaska, for instance, Helly Hansen’s Impertech Jacket ($70; www.hellyhansen.com) is a popular choice. It’s not breathable, but it’s tough, fairly light, 100-percent waterproof (and windproof, of course), and stretches for comfort. It vents through a back “cape” opening. Matching pants are $55, so for $125 you have a good rainsuit for the conditions you’ll be facing.
The alternative is something in the waterproof-breathable arena. Arc’teryx’s Theta AR Jacket, for instance, is made with Gore-Tex XCR and has reinforced patches for increased durability. I think it would be tough enough, and its generous, long cut would keep you dry. But it’s also $450 (www.arcteryx.com). More affordable is ($199; www.rei.com), a non-Gore-Tex piece that I like very much. I worry a little about its durability in a high-impact environment, however. But it’s light, sheds rain well, and is wind-proof, so there’s that. Mountain Hardwear’s Exposure II Parka uses that company’s own proprietary waterproof-breathable material, has reinforcements for rugged conditions, and sells for $200 (www.mountainhardwear.com). Maybe a better choice in the higher-priced stuff.
Myself, I’d give the Helly Hansen stuff a close look. You may sweat a little if you have to portage in the rain, but if you’re stuck in a canoe in a downpour, I can guarantee that it won’t leak.
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