... retardant function as request-- tear resistant, shrink-resistant-- Strong strength and elongation, soft, non-toxic-- Excellent property of air ... 5tons/1*20ft, 12-13tons/1*40ft7) Features Anti-pull,acid-resisting,non-poisonous,good in ventilatory, no harm ... them for you. Advantage1)eco-friendly2)anti-bacteria, anti-pull,3%uv,,antistatic3)original manufacturer, competitive price4)mothproof, breathable, ...