What to wear to the office in Kuala Lumpur?

I am an American visiting Kuala Lumpur on business. I dress pretty casually - t-shirt tucked in jeans/nice travel pants, Adidas Samba sneakers, and the like. Think casualwear from Old Navy, Uniqlo, H&M, etc. I never needed to dress business formal for my job, so I don’t really have business formal clothing....