The first time I travelled in Asia I did not pack well. I assumed it would be warm everywhere and so didn't bother to take a proper jacket, just a hoodie. I got a nasty surprise in the north of Vietnam. Having learnt from my mistakes before embarking on this trip I wanted to make sure I had a waterproof, warm jacket to take with me. I shopped around a lot and decided on this SuperDry jacket as, it's waterproof but also warm since it has a fleece lining and it doesn't look too ugly. As this is my only jacket, it was important to me that it looked nice enough for me to want to wear it. The only thing I would warn is that the collar and hood are bulky therefore it takes up A LOT of space if you're in an area where you won't need the jacket for a while and therefore want to pack it away in your backpack.
No matter how big your backpack is you will not have enough space for a normal towel. And even if you did it would be a pain in the arse as they take hours to dry. Take a microfiber towel instead. They take up hardly any space and dry in a little as 30 minutes to an hour. Really useful when showering in the morning before a long journey. If you would like to be able to walk back to your room in a semi-decent state from shared shower areas be sure to get an XL or XXL size as the medium micro fiber towels are about as big as a napkin.
I'm so sad I didn't know about these before I left and that Amazon won't deliver to where I am currently (I have no postcode, which for some reason they're not so keen on!). ExOfficio underwear is designed to dry quickly and to keep their freshness so you could travel with as little as two pairs, just hand washing one each night. So many people have recommended them to be since I've been travelling. If you haven't left yet they're definitely worth checking out.