An update to our fan favorite Equilibrium I Tank the Equilibrium II tank features the same longer silhouette but with a lower scoop neck in the back. We removed the bottom band but kept the side slits and barracks. 120 GSM Performance Fabric; Lifestyle Fit; Anti-odor technology; UPF 50 Protection (55% Organic Cotton/40% Viscose from Bamboo/5% Elastane)