Originally Posted by
Tourist in MSN
I think any filter will be damaged from freezing. A friend of mine left his MSR filter with water in it out when the temperature went below freezing. No more filter. On several occasions I have brought my filter into the tent during the night to make sure it did not freeze.
Nope, not all. Sweetwater recommends freezing theirs. Been doing it since 1997....without a problem and of course have been down to SA many times...