Thanks very much everyone.
I'll get the 21oz. 
Just to answer some questions, I'm from hot and humid Singapore. But I'll only be wearing the jeans in air-conditioned environment 90% of the time. My only experience with selvedge jeans are Samurais and the heaviest I think is 19oz.
Thanks again.
Hi everyone.
Not sure where to post this…
Anyways I am going to buy my first pair of IH. Please help me decide which one should I get for my first pair. If you can also kindly share the reasoning why you pick one over the others it will be much appreciated.
IH-634S
IH-634S-UHR
IH-634-XHS
IH-634-XHSib
Actually the one I really want is the IH-634S-A but unfortunately I'm late. Many thanks.
