Swivel Retractable System
The swivel system is designed to be wide during the hail periods and narrow when access is needed in early spring for bee pollination or over winter when the trees are bare.
The canopy is converted from wide to narrow and back again by pulling on each end. A row 1000 ft (300 m) long is swiveled in a couple of minutes !
Note how the fabric pulls up tight and out of the way in the process of swiveling. The picture below shows the swiveling process.