Used w/helmet, flyer's sph-4
An item of foamed plastic molded to conform to the contour of the inside of a helmet shell. It is designed to be permanently installed in the helmet to afford increased protection to the head from impact.
Classification: Military wearing apparel of all types and materials, including footwear and headwear
NSN 4140-00-277-6285
NSN 5999-01-620-0291
NSN 6145-01-359-7015
NSN 5905-01-303-3895
NSN 6105-01-607-0381
NSN 5950-00-050-4942
NSN 5990-01-009-3634
NSN 5930-01-318-1133
NSN 5945-01-564-2721
NSN 6110-00-180-4601
NSN 5998-00-306-4453
NSN 5965-01-088-1761