Howard Leight MAX-1 Disposable Foam Earplugs (200-Pair Box)

The MAX-1 is a single-use polyurethane foam plug with NRR 33, ANSI S3.19 certified, and manufactured by Honeywell's Howard Leight division. The OSHA derating formula — (33−7)÷2 = 13 dB — puts real-world protection at the top of the single-use foam category. A 90 dB air compressor derates to approximately 77 dB at the ear; a force-air dryer running 100 dB derates to roughly 87 dB, above the action level but within the 90 dB permissible exposure limit for the durations typical in car care. For sustained grinder work at 105 dB, the derated 92 dB at the ear approaches the OSHA limit for extended exposure. The pre-shaped bell contour and closed-cell outer skin reduce insertion-technique sensitivity relative to plain cylindrical foam plugs, and the low-pressure foam profile extends wear comfort across multi-hour sessions. Each pair is single-use: the 200-count dispenser box is the practical format for regular shop work.

Best for car-care owners who run loud equipment — compressors, force-air dryers, impact wrenches — and want maximum passive protection without a recurring hardware expense. NRR 33 is more protection than polisher-only work requires, but it is not overkill for mixed-tool shop environments. Skip it for tasks where hearing conversation or equipment signals matters; the NRR 33 passive plug blocks all ambient sound and there is no fast-removal convenience feature. Skip it if single-use plastic waste is a concern — reusable silicone flanged plugs at similar NRR generate far less disposal volume. For sleep, travel, or concert use, lower-NRR plugs tuned for different frequency profiles are the better fit.

The MAX-1 is a polyurethane foam plug — no SDS, no chemical exposure in normal use, no inhalation pathway. Health score is 9.5 (base); no natural latex is disclosed in the PU foam construction, and no PFAS surface treatment is claimed or documented. On the environmental side, this is the highest-waste sub-type in the category: single-use PU foam is not recyclable in any consumer-accessible stream, and a 200-pair box represents 200 pieces of plastic waste. There is no manufacturer take-back program and no recycled-content claim. Regular shop use at several sessions per week can consume hundreds of pairs per year; buyers for whom waste matters should evaluate reusable silicone or multi-use foam alternatives.