Fiberglass unidirectional fabric is made of fiberglass 
  direct roving parallel aligned in 0°,90°directions 
  then stitch with polyester fiber threads.The both 
  products are extensively used in GRP pultrusion process,hand 
  lay-up process and RTM vacuum infusion and winding process etc. 
  Suitable for unsaturated polyester resin,vinyl ester resin,epoxy 
  resin and phenolic resin system etc.Main products include 
  GRP boats,automobile parts,wind energy baldes,etc. 
  http://www.fiberglass-cn.com