For a first aid kit, it is essential to include **sterile gloves** and **sterile dressings**. These items are crucial for treating wounds and preventing infections. Sterile gloves protect both the injured person and the helper, while sterile dressings are used to cover wounds and burns, keeping them clean and protected.

On the other hand, a **neck brace** is not essential in a first aid kit. Although it can be useful in specific situations to immobilize the neck in case of suspected cervical injury, it is not a basic item that must be present in all kits. First aid focuses more on controlling bleeding, treating burns, and protecting wounds, where gloves and dressings play a fundamental role.