I like to travel light. In term of clothing, whether I go for one week, 4 months or one year, I find I pack usually the same amount of clothing! My list really depends on weather. Will I go through very cold to very hot? Layering and “intelligent” odour-resistant clothing is best.
My riding suit is better adapted to summer (as heat is more of a problem than cold) so vents and airflow are essential.
For cold, layers and a 2 pieces rain suit that can be put over my trousers and riding jacket is my favourite solution and pack smaller than the bulkier thermal/rain liner insert.
Then combo of thermal t-shirt (I love Under Armour and does not smell) , micro fleece, good quality feather jacket, Motorcycle jacket and on top the thin rain jacket.
For intense heat, a long loose sleeve shirt (high wicking- I have a couple of those, found in outdoor shops). I always use riding long johns. I am still to find the ideals ones that would work for both heat and cold. IF colder I can always buy cheap stuff on the way and ditch it when not needed anymore.
Always 2 bras only. Both sport bras, one black one white/flesh colour.
Socks: mainly in wool. Smart wool has a nice range. Why wool? Because it does not stink after few days usage!
Out of bike stuff: one outdoor beige trouser that dry very quickly, and one short. A small bikini can be useful for washing in public (rivers etc…) and maybe a tank top. I am small and my clothes are tiny too.
Shoes: flip-flops (for dodgy showers!) and light trainers.
Wool gloves liners, that can be used as glove come handy too.
What used to take lots of space was the toiletry. Not anymore. I discovered a solid shampoo/conditioner that works for me and lasts a long time. I also carry a multipurpose moisturising cream (night/day face cream, body and hand cream all in one!). So toiletry bag is now tiny.
I also carry a laundry solid soap (I buy it online when we starts then can buy in shops outside of Europe!). Those soaps wash anything. My luxury item are Marigold gloves, as the laundry soap is very aggressive on skin but very efficient. Much better than the liquid travel soap you can buy in travel shops for lots of money!
And I do laundry very often.
Essential item though is deodorant. Could not go without. Again for obvious reasons.
So in term of clothing I carry very little. Whatever I may need in addition to my main list can be purchased (usually cheap) and discarded later to minimise my luggage.
See pictures of our set up for London to Mongolia and back trip last year in my blog (link below) or
in this thread.