A cotton + microfiber collar neck T-shirt is a type of T-shirt that is made from a blend of cotton and microfiber materials. The collar neck design adds a touch of sophistication to the classic T-shirt style. The microfiber material provides extra softness and durability, while the cotton material makes it breathable and machine-washable. This type of T-shirt is perfect for everyday wear and can be dressed up or down depending on the occasion.