1,high level ventilation 2,OEM are welcomed 3,waterproof coating 4,all seams are seam taping Product specifications/featuresFly:Polyester Tafetta ... specialized in making different kinds of tents,like lightweight tent,family tent,dome tent,bike tent,bus tent.And in additon,we have our own factory ... have any inquires,please do not hesitate to contact us. 3-4 person camping tent