temu product brand

The last one I installed (around last fall) has already become conspicuous yellow.
1/2 of the room is not ugly, so I replaced it today.
However, there is still a color blur and I will attach a photo, but it was not very good.
　How long will this gray color last?
　I'm using a new one, so I can't do anything about it

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12 Pcs Of Wall Soundproofing Panels, Acoustic Foam Absorption Wall Panels, 12"×12"×2" Acoustic Damping Wall Panels, Used For Reducing Noise In Bedrooms And Studios, Grey And Yellow-Yellow

12 Pcs Of Wall Soundproofing Panels, Acoustic Foam Absorption Wall Panels, 12"×12"×2" Acoustic Damping Wall Panels, Used For Reducing Noise In Bedrooms And Studios, Grey And Yellow-Gray

Gray

Soundproofing manufacturers

Buy 12 Pcs Of Wall Soundproofing Panels, Acoustic Foam Absorption Wall Panels, 12"×12"×2" Acoustic Damping Wall Panels, Used For Reducing Noise In Bedrooms And Studios, Grey And Yellow-Gray

temu product brand12 Pcs Of Wall Soundproofing Panels, Acoustic Foam Absorption Wall Panels, 12"×12"×2" Acoustic Damping Wall Panels, Used For Reducing Noise In Bedrooms And Studios, Grey And Yellow-Gray