... Environment-friendly product, made of natural material, no content of PVC, no content of toxic substances of formaldehyde, benzene or ... No discoloring, no mildewing, nontoxic, odorless, no releasing of harmful substances, mothproof, excellently stableAir Permeability: Good, free ... Time: Lifetime longer than 15 years, the organic combination of adhesive, quartz fabric and coating to form an ...