Mens Sustain Yoga Tank by 4-rth Crisp & Refined with utmost attention to stitching & detail. 2x1 RIB used exclusively to provide utmost style, comfort & sleek contours -- providing unlimited range of motion while always maintaining shape. Designed & hand-made in Los Angeles from a custom ProModal fabric -- softer than cotton while more durable & colorfast - this tank will last 4 years. Seam down center back with "4" logo mark at top & matching green thread down seam.  ProModal is made from Beech wood and Eucalyptus grown in sustainable farms, having 1/20th the eco-impact of cotton. It wicks 50% more moisture than cotton, is softer, more durable & more colorfast. Available in Black, Royal, White and Heather Grey. Fabric: 100% ProModal.