The Portwest Endurance Clip-On Ear Defenders offer excellent noise attenuation with an SNR of 27 dB and are designed for easy clip-on attachment to Endurance and Height Endurance helmets. They feature a convenient stand-off position for intermittent use, allowing the ear cups to be comfortably repositioned when not needed. An adjustable dual-pin system provides multiple positioning options for a secure and comfortable fit, though attenuation performance may vary depending on helmet style. The product is CE-certified to CE-CAT III standards and is supplied in a retail presentation bag, individually packed for suitability in vending machines.