I'll go straight to my answer:
been to bora 4x already,
As what others already suggested,
yes you can find lots of cool cotton shirts and board shorts in department stores sa malls (SM, Ayala, Gaisano, etc...)
the cheapest ako na palit was only 199 pesos.

ako gani to gi gamit sa imperial. hantod karon buhi paman.
also try maui&sons na brand, naa rasad na ngadto. medyo mahal jud ang uban nindot (what you pay is what you get)
if you're not familiar kung asa located sa department stores, pangutana lang sa mga staff/guard ngadto.
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Other thing:
by the way,
you're in the wrong section, and this topic is redundant. please explore the forum first since you're new here, and check where and what you'll post
cheers!