Cool Canuck's long sleeve T's are perfect for use as an everyday shirt or as a base layer for sports. Efficient moisture management and the ability to help you stay cool makes this shirt an instant favourite. Unlike most performance shirts that simply wick moisture and evaporate it away, CoolCore fabric technology is engineered to trap excessive moisture, cool it, then control the rate of evaporation. This process cools the shirt down to about 15C without the use of any chemical treatments. If immediate heat relief is needed, our shirts can be pre-wet, wrung out and then worn. The fabric is designed to hold a reasonable amount of water without feeling heavy or uncomfortable. UPF 35 reduces the effect of the sun's harmful rays. Machine wash without fabric softener. Cool Canuck products are made in Canada and guaranteed to be free of defects.