Worksafe-Deluxe-Clip-On-Ear-Defenders-Worksafe-SSP19CO-Lightweight-yet-rugged-construction-certified-to-BS-EN-352-3-2002-standard-Hearing-protection-level-in-excess-of-the-standard-with-an-SNR-of-30d B-Fully-adjustable-ear-cups-to-ensure-a-precise-seal-against-the-head-Suitable-for-use-on-all-Worksafe-helmets-or-any-helmet-with-a-30mm-fixing-point-Fully-approved-to-protect-against-high-noise-levels-in-most-working-environments-Worksafe-SSP19CO-Deluxe-Clip-On-Ear-Defenders