The first half of this comment is an example of a man attempting to be helpful in the women's forum. (Not necessarily succeeding, as I'm confident the OP didn't need a guy to point out the existence of "leggings" as if the term was from a foreign language.)
The second half is an example of an instance where maybe the man should have thought twice about whether his opinion was relevant before posting it. Is a man's opinion on the appearance of women's butts in leggings relevant to a conversation about comfortable, lightweight clothing for backpacking as a woman? (It's not.)
Ah, Whiteblaze.