MACK’S® Slim Fit Soft Foam Earplugs, Comfort for smaller ear canals. Our Slim Fit size earplugs are the same as the original SafeSound®, but smaller. Made with super soft foam, these earplugs are perfect for extended use where comfort is paramount. Sleeping, Studying, Shop noises, Work, Travel, Loud Events etc. Fully skinned and tapered, providing unmatched user comfort and hygiene.