... eco-friendly, and durable 3.Anti-slip, anti-shock, and anti-shake Sticky Anti-Slip Mat Black for Cell Phone Product ... . Product Features:Material: SiliconeNon-toxic, eco-friendly, and durableAnti-slip, anti-shock, and anti-shakeStrong adherence ability, easy to stick ... , no residue left on the surfacePrevents mobile phone, coin, MP3 or MP4 player, ...