To use this base layer, simply put it on like any other top. It's designed to be worn under your jerseys for added comfort and warmth in cool conditions. When it comes to care, you can machine wash it on a gentle cycle. Use a mild detergent and avoid using bleach. Hang it to dry to maintain its shape and performance. Also, avoid ironing directly on the fabric as it might damage the material. If you notice any signs of wear and tear, it's best to replace it to keep getting the best out of it.