Protect your samsung m31s from scratches and friction with this High-quality hard case.Nillkin Super Frosted Shield Matte cover case for Samsung   use  environmental PC materials. Formed by the highly precise injection molding machine with high temperature. Both sides use the latest dustlessmatte UV painting technology, with comfortable sense of touch and elegant appearance.  rigidity is good enough not to transfer and break off easily. Open mold according to real mobile phone with precise function holes. You can handle as freely as you wished. The surface uses salient point design, wear-resistant, anti-skiddin, dust-proof, anti-fingerprint and easy to clean. Simple, stylish but not normalWe cannot choose to be born; we cannot choose our parents or the immediate circumstances of our upbringing Environmental protection materialUse  environmental PC materials, meet the international environmental standerds.