ultra soft silicone gel, superior thin polyurethane skin, high density memory foam Two Ways to Install - 1. The adhesive allows you to peel and stick the gel ear cushion to headset(NOTE - You need to attach the silicone ear pads to your plastic pads! This way more suitable for Peltor 100/500 and Rangeguard). 2. And they come with plastic plates that allow you to replace the plastic base, and then stick the pads on the base(This way more suitable for 3M other headphones and MSA and Sordin Earmuffs). (And there are install tips on the package.) Designed for Most 3M Headset - The above two methods are suitable for most of 3M Earmuffs, WorkTunes Connect, Peltor Tactical 100,300,500, Rangeguard, Shotgunner II, ComTac, ProTac, Sound Trap, Swat Tac, Tactical 6-S, TacticalPro, Peltor X1A-X5A. ZOHAN EM042, EM033. Superior Gel Cushions - HOCAZOR G-1003 has an ultra-thin sheet of polyurethane that Great outer skin allows silicone gel to not easily break and spill. Meanwhile with addictive touch, durable and skin-friendly. Earpads need to be cleaned or replaced regularly to keep ears healthy. The G-1003 material is easy to clean and greatly increases the service life of the ear cushions and helps you save money. More Comfortable, More Convenient - There is a hole on the gel cushions, which provide anti-sweat, and is easy to clean, you could clean the outer skin with soapy water as necessary, but do not submerge to allow proper functioning. The groove design of the silicone ear pads can relieve the pressure caused by the earmuffs and keep the earmuffs well-sealed even when wearing glasses. Greatly improve comfort and convenience. Colour:black Material:Silicone+sponge+TPU Package Contents: 4 x Replacement Ear Pads