Sleep Like a Baby 💤 - Block Out the Noise, Embrace the Calm! Includes a convenient keychain case for on-the-go protection. Trusted by healthcare professionals for superior hearing protection. Perfect for sleeping, studying, concerts, and more. 33dB NRR ensures peace in any environment. Crafted with Comfy Cush Comfort Foam for a gentle fit. 33dB NRR Ultra Comfort Foam Made in USA Mack's Ultra Soft Foam Earplugs offer the highest Noise Reduction Rating (NRR) of 33dB, ensuring maximum comfort and noise-blocking capabilities. Made in the USA with premium foam, these earplugs are the #1 choice for doctors and are perfect for a variety of situations, from sleeping and studying to concerts and travel. Each pack includes 30 pairs and a handy travel case.