AXIL X30I Monster Jam Earplugs Sparkle Smash. Simply choose which tip works best for you insert these ear plugs in your ears and then decide which mode you want to be in: Open or Closed. In Open Mode youll hear sound clearly and naturally then when loud sounds hit your ears the Dynamic Mesh Filtering System will automatically compress those sounds to protect your hearing. In Closed mode simply close the valve for total hearing protection from all sounds. These are small handy and can go anywhere with you so you always have hearing protection when you need it without blocking off all your hearing. Specifications for AXIL X30I Monster Jam Earplugs: Manufacturer: AXIL NRR: 21 - 25 dB Quantity: 1 Size: One Size Fabric/Material: Silicone Features of AXIL X30I Monster Jam Earplugs Ultra-Comfortable Design Protective Hear-Thru Technology Toggle Switch for Closed Mode Interchangeable Eartips Pocket Carry Case Water & Sweat Resistant Certifications ANSI CE EN352-2 AS/NZ IPIL Package Contents: AXIL X30I Monster Jam Earplugs 3 Sizes of Silicone Tips (S M & L) 2 Sizes of Foam Tips (M & L) Color-Matching Pocket Carry Case Instruction Manual AXIL X30MJ-SS: X30I Monster Jam Earplugs Sparkle Smash