What covers the entire apex area and usually covers more than half of the nail plate?

The full-well design is specifically structured to cover the entire apex area of the nail, which is the highest point of the nail. This design typically extends over a significant portion of the nail plate, often covering more than half. The purpose of a full-well is to provide additional strength and structural support to the nail enhancement, making it particularly effective for any type of nail work that requires durability and stability.

In contrast, a half-well would only cover a portion of the nail plate, usually less than half, which would not provide the same level of support or coverage. A flat overlay refers to a uniform application across the nail without the well structure, which does not feature the apex coverage inherent to full-well designs. Nail wraps, while also used for reinforcing the nails, typically do not cover the entire apex area in the same manner as a full-well and are often used for specific repairs or enhancements rather than complete coverage.

Therefore, the choice of full-well is justified as it perfectly aligns with the description of covering the entire apex area and a significant portion of the nail plate.