Here are some of my favorite (tank) tops for this coming Fall/Winter...I guess if you're living in a tropical country you are bound to wear tanks all the time...
One-pocket tank top by Oak
Seamless Jersey Double-Layer Tank by Boris Bidjan Saberi
Classic ribbed tank by Rick Owens
Cotton Stretch Jersey Reversible Turtleneck by Obscur
Sweater with Turtleneck/Hood by Forme d'Expression
(I simply love this. You can wear this so many ways!!!)