It is typically made of lightweight, breathable cotton fibre and scome in a variety of colors. These Long sleeve t-shirts can be worn on their own or as a layering piece under other clothing items, such as jackets or sweaters. They are a versatile clothing item that can be dressed up or down depending on the occasion, and are commonly worn for both casual and formal events. The fit of can vary from loose and relaxed to fitted and tailored, depending on your style and preference.