However the second one ( blue ) does have cross flow , inflates well , but is also unstable .
The first pfoil ( black ) does not have cross flow venting , and probably can not be convereted to fform .
The second one ( blue ) does have cross flow , inflates well , but is also unstable .
The first pfoil ( black ) does not have cross flow venting , and probably can not be convereted to fform .