2XU proudly presents the Men's Active Tri Singlet which is engineered with 70D Kinetic Speed fabric for supreme aerodynamics. Kinetic cool for thermo-regulation with 4-way stretch material. The singlet has flatlock seams to prevent chafing and one rear pocket to hold your items. The Singlet also has a 3/4 front semi-lock zip to make sure you stay firm but comfortable during your activities.