SS Means Spring Summer And Refers To The New Colors Offered In This Collection. Organic Stretch-Cotton Tank In A Throwback, Cropped Shape That Hits Right Around The Waist. Versatile, Comfy, And So Cute. 92% Organic Cotton, 8% Spandex. Signature Bound Edge Construction. The Color 'Cotton' Often Has Natural Flecks Throughout- Adding To The Beauty Of The Unbleached Fabric. **We Like Our Clothes Washed Cold, Line-Dried, And A Little Bit Rumpled Around Here. Your Clothes, Energy Bill, And The Earth Will Like It Too! :)