What washing parameters are specified for cleaning the structure helmet shell?

• A. Hot water above 140F with any detergent
• B. Cold water with bleach
• C. Any water temperature with abrasive cleaners
• D. Warm water up to 105F with mild detergent, pH 6 to 10.5

Answer: (D)

Cleaning the helmet shell requires a balance between effective cleaning and protecting the shell materials. The recommended method uses warm water up to 105F with a mild detergent and a pH of 6 to 10.5. This gentle combination lifts dirt and oils without risking damage to resins, coatings, or adhesives, and avoids harsh chemicals that could degrade the shell. Hot water above 140F can warp or weaken the materials, bleach or harsh cleaners can erode coatings and seals, and abrasive cleaners can scratch or wear the surface. Following these parameters preserves the helmet’s integrity while keeping it clean.