ProGuard Earsonics Pro-Musicians Custom Earplugs come with a choice of three different acoustic filters, 8dB (soft Pad) used for low level protection will give excellent dynamic response,13dB (medium Pad) allowing you to feel the musical sensation and 17dB (Hard Pad)for efficient noise safeguard but still allowing you to hear the full acoustic experience (Please be aware: the filters are not interchangeable and you only have a choice of one set, you can make this choice when you send your impressions back to us). The Earpad is in fact the first linear Earplug with new patented loudness musical response concept, in other words the high and low frequencies are boosted to compensate for the ears natural susceptibility to lose the detail of these frequencies when the volume is reduced, a similar experience happens when you switch in the loudness button on an amplifier. The resulting sound will give amazing experience for musicians and audiophiles yet still give you the protection you need. The custom earplug body is manufactured from clear hard acrylic making it completely durable, hard wearing and comfortable for long periods of use. ProGuard recognise the importance of individual hearing products, we will simplify every stage of getting your own custom fit products made. Of course each product in the range will require impressions of your ears. The process is completely painless and will take no longer than 15 minutes. If you want to get a full understanding of the process where it is fully explained, go to the audiology section on this site. Because we offer a straight out of the box solution, arrangements will be made for impressions to be taken of your ears at one of our locations nationally. Once this procedure has been carried out, you just need to send them back to us in the pre-paid box supplied and in approximately 14 days your own Custom Fit hearing product will arrive at your doorstep.