Placing the right hand on the flange, firmly hold the finger grips on the side of the pouch with the left hand – taking care not to grip the inner liner through the pouch. Guide tabs make correct positioning easy.
Use the left hand to firmly snap the outer part of the pouch across the body to the left hand side.
Repeat the above actions in the opposite direction i.e. place the left hand on the flange and use the right hand to firmly snap the outer part of the pouch across the body to the right hand side.