1. 18 A pull ring is added to obviate the disadvantages of the prior rubber shoes, such as bulkiness and poor portability.

2. When wings are open, rotate Anticlockwisely the pulling ring to lock the wings Close the Wings Rotate clockwise, push the pull ring downwards Close the wings, rotate anticlockwise to lock Open & Closing Wings Enter through the ports when closed Open & Lock, get close to abdominal wall