Lawn Sale
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cbcbd said:Even though it's true that down will lose all it's insulation when wet you still need to get the bag very wet in order hurt the insulation. Most modern bags have shells that are water resistant and will shed water pretty efficiently. Also, minimal precautions can be taken to not get your bag wet.
Down bags are not the deathtraps they are sometimes portrayed to be.
No, they are not the deathtraps, and in summer there is more of a chance of just being uncomfortable. But, when it's been raining heavily for 3+ days and/or it's been sitting in a puddle inside your tent, it's going to get wet and heavy.
How many of us remember last May, where it rained for 23 days out of the month, and Ivy's rainy trip on the hundred mile? How many people sweat profusely during the summer? I spent a night at the Frye Notch shelter with a guy in the Marines, it was 80° and he didn't have a bug net. The mosquitoes were so bad his only escape was burrowing in his sleeping bag, and the next morning both he and his bag were completely drenched. I slept on top of mine all night and was comfortable. The next night it was 86° at night (Hall Mountain), but the following one it was back into the 50's.
Sure, you can dry the sleeping bag during the day, but the covering you mention also makes them harder to dry.
My point is that with a sleeping bag of that rating, you're not going to save a ton of weight by staying with down and it will much more likely get wet in the summer than in winter, but it's also not life threatening.