Specifically designed as a vent net to allow ventilation and light into your greenhouse. Clear colour
The only way to really cool down a greenhouse or tunnel is to replace the hot air with cool air. Hot air rises, so the heat is at the top of a greenhouse or tunnel. That’s why swivel vents above the doors and side vents all the way down the side of a greenhouse/tunnel are a good idea. The hot air escapes from the top of the tunnel and is replaced by cool air drawn in at ground level. Except that until now the mesh to keep the wind speed down (which dries out the plants) has been too much of a windbreak and not enough of a vent mesh.
PolyVent netting is manufactured specifically and exclusively for XL Horticulture. Most green side vent mesh is actually a windbreak and the most transparent you can get is 50%. The amount of air passed through a hole in a net is exponential, so the amount of air passing through a 25% PolyVent netting is approximately 3 times as much as through a 50% windbreak. So PolyVent netting slows down the air but doesn't stop so much that it cant cool down the tunnel enough.