... )255gsm (7.5oz/yd²Total Weight355gsm (10.5oz/yd²)Air-flow through ratesRegular Width1.60,2.0,2.20,2.50,2 ... backing film)270gsm (8oz/yd²Total Weight370gsm (11oz/yd²)Air-flow through rates37%Regular Width1.60,2.50,3.20meters(126'')/5 ... backing film)270gsm (8oz/yd²Total Weight370gsm (11oz/yd²)Air-flow through rates37%Regular Width1.60,2.50,3.20meters(126'')/5 ...