Sonitus Acoustics The Kicker III 18"x16"

very high-quality product. but does not muffle as much as I expected. I dont record so could not tell any difference between it solid and with optional parts removed. Its does muffle both front and back at once, but is only useful for the size bought for, EG i bought mine for e 18" bass drum and it therefore useless for my 20". I have gone back to a towel /heavy blanket for a more universal/adjustable effect.

Easy to install
Stay in place
Muffling without killing the drum
After time this product tends to dry out and very slowly break down into tiny particles. Still has its shape and works well but it's starting to shed. I have 4 and all are beginning to shed.