Rav Belsky in sefer Shulchan Halevi writes that a mesh pair of tzitzs is patur from tzitzs.see inside for his savorahs.
If I remember correctly Rav Sternbuch in Tshuvos v'hanhagos chelek 5 holds that it could be mechuyav in tzitzs(read it a while ago).
Igros Moshe OC 2:1 I believe he holds one does not make a bracha and it is patur from tzits.The reason being it is like leather(does not need to be woven together).