The next word: calcetines de senderismo, the hiking socks.
You picked the wrong socks. You are standing by a cold lake – “kalter See” – your feet hurt terribly, “tierisch weh”, and it feels as if you had stepped into nettles, “Nesseln” (calcetines).
You think about what to do better next time (de): you will have your sports shop send you – “senden” – stretchier socks, and there is a huge moon on the packaging (senderismo).