To wear this Thessy Top, simply put it on over your head. It'll look great with jeans or a skirt. As for the small grey mark on the collar, don't worry too much as it's faint. When washing, use a gentle cycle and mild detergent to keep the color vibrant. Avoid using harsh chemicals that might damage the fabric. Hang it to dry instead of using a dryer to prevent shrinkage. Enjoy wearing your special top!