What material is primarily used for the construction of the Nose Cup?

The correct answer is neoprene rubber, which is primarily used for the construction of the Nose Cup in the SCBA. Neoprene rubber is chosen for its durability and resistance to various environmental conditions, making it well-suited for applications where a reliable seal is crucial, such as in breathing apparatus. This material is flexible yet sturdy, allowing it to conform to the shape of the user's face, ensuring that the Nose Cup creates a tight seal to prevent contaminants from entering the breathing space.

Additionally, neoprene rubber can withstand a range of temperatures and is resistant to degradation from chemicals and oils, which is particularly important for firefighting and rescue operations where exposure to harsh conditions is common. Its suitability for extended wear and comfort also contributes to overall user performance and safety.