Tight-fitting garment with long sleeves and a high neck?

A tight-fitting garment with long sleeves and a high neck is commonly referred to as a "turtleneck" or "high-neck top." Turtlenecks are often made from stretchy materials and are designed to hug the body, providing warmth and a sleek silhouette. They can be worn casually or dressed up, making them versatile for various occasions. This style is popular in cooler weather and can be layered under jackets or sweaters.