Polarmax??en's micro H1 LS crew with acclimate??c and insect Shield is an ultra-innovative high-performance crew built with both acclimate??c Advanced cooling and insect Shield technology. The acclimate??c, activated by the moisture from your sweat, will keep you significantly cooler to the touch while the insect Shield will keep any unwanted pesky bugs at bay. insect Shield will kick any mosquitoes, ticks, ants, flies, chiggers, and midges to the curb.