BETTFOR Champagne Stoppers with Stainless Steel Champagne Saver with Food Grade Silicone Leak proof Keep Fresh Suitable for Cham

3D Acoustic designThick, 2 inch foam can be used to absorb lower frequencies to control and trap bass and to control and trap echoes,providing the ideal level of moderate sound control on walls or ceilings Environmental and safetyThese acoustic foam panels are Made of quality polyurethane High density flame-retardant foam material,odorless,non-toxic, fireproof, durable, efficient and safe to use and also passes flame retardancy requirements Expands quickly Our foam panels come compressed in a vacuum package and quickly recover to normal size, either by placing in a well ventilated place for about 24-48 hours or soaking the foam in water for one minute then wringing the water out and using a hair dryer or letting it airsun dry Easy to InstallThese studio sound absorbing panels can be used as acoustic cover for walls, ceilings and doors, just easily attach it with staples, nails, screws, tacks or glue Economical solution KTOESHEO foam squares are a low cost solution to create a great listening or recording environment with the best value noise reduction products