A Heathpack is a clump of heather (as in the flowering plant). No, my name is not Heather IRL. I like the word because it is the name of something beautiful but it's not at all girly-sounding. I also don't like pink on my bike stuff. Although I like pink otherwise, go figure.
I took the word from a poem called Inversnaid by a guy named Gerard Manly Hopkins. Inversnaid is a town in the Scottish highlands, on Loch Lomand. The poem is kind of remarkable, it's describing a little waterfall & brook outside of the town of Inversnaid and if you read it aloud, the poem sounds like a little brook bubbling along. Itlooks very simple but its a technically very impressive poem and the first poem where I finally "got" all that. It was kind of a game-changer for me, I went on after that to pretty seriously study modern poetry. Now I am a veterinarian but my first love remains modern poetry and it was that little poem Inversnaid opened that door for me. To this day, I sometimes recite it out loud when I'm by myself, I just really like the way it sounds.
Lol, my husband is a practical guy, former Navy pilot. He does not "get" poetry. Every now & then I'll start talking about it, trying to explain why some poem is really really good. His typical response is, "Wow, you got a lot out of that". Fortunately for me, he gets cycling. So I have no complaints.