A tubular one (1) in flexible impermeable material is equipped of means of tie to estate (2), (3) that engage a its extremity (4) to aim them (7) of umbrellas (8). In conditions of opening of the umbrellas the tubular girdle (1) is collected around aims them, between average sayings of tie (2), (3) and burlaps (13) of the open umbrellas and theses to cupola. In conditions of closing of the umbrellas (8), the tubular girdle (1) comes extended along burlaps (13) harvests, constituting a tank in which they are collected drips some to them of water that they are unloaded from bathed burlaps.