"CoolPlus®" is a wicking fiber applies the "capillary action" resulted from the micro-slits on the fiber surface to rapidly absorb sweat from skin surface through actions of wicking, diffusing and transporting. At the mean time, air permeability of this fiber release hot air out of body to let skin feel fresh and cool.
Macro brand PBT fabric has combination of polyester and PBT yarn. PBT is texturized polyester with natural stretch similiar to LycraR. The most distinguished characters of PBT is chlorine resistance. It is also resistant of salt water and color fading.
Polypropylene is a smart fabric. It is a 4-way stretch, light weight synthetic fiber widely used in active wear with many splendid features that can keep you both cooler and warmer with breathability.