Sennheiser SoundProtex Plus (article 108-3144) are reusable multipurpose earplugs designed to protect hearing without making everything sound muffled. Instead of simply blocking the ear canal, they use innovative two-stage acoustic filters with patented membrane technology that reduce sound evenly across the frequency range, so music, speech and your own voice still sound natural - which is why musicians, sound engineers, concert-goers, DJs and festival crews favour this kind of earplug. The kit includes three interchangeable acoustic filters: strong (for loud concerts and power tools), medium (festivals, travel) and weak (quieter concerts and noisy public spaces), plus a set of full-block filters for complete noise reduction when relaxing or sleeping. Three sizes of soft, flexible, medical-grade TPE ear tips (small, medium and large) give a secure, comfortable and biocompatible fit, and the earplugs are non-allergenic. A Sennheiser storage pouch is supplied to keep the earplugs and spare filters together. They can be reused as often as needed - simply wipe them with a cloth or rinse under water after use. Suitable for concerts, rehearsals, construction sites, workshops, at home or in the office.