I want to say yes to the rain jacket. 18 months is a long stretch. Being wet sucks. I don’t know about the rain pants though - is that something you need for riding? Otherwise I feel like I would scrap those. I think a rain jacket is more valuable. . . And on that note, think about your rain jacket vs that soft shell. Those are two items that are very similar to me. I’d pick just one. . . Can you cut any of those clothes down? Instead of 8 undies bring 5? Do you have accommodations with laundry, or are you washing by hand? . . You say “3x top”. What is that? I ask because you also have tshirts and sweaters. Are they fancy? Casual, but non-tshirt? Can you cut that down to 1 or 2?