Jie Yang’s blow mold case is made of high density PE(PE-HD) that can withstand a full grown adult’s weight without permanent deformity. Special surface design/pattern provides rigidity while giving visual elegance. The surface texture and pattern is also patented. The product comes in a variety of colours. The PE-HD material is totally compliant with the current Restriction of Hazardous Substances (ROHS) directive. http://jieyang.imb2b.com/