Do the parcel is properly covered so that no one can see what z inside the parcel?

yes, it is fully covered in a parcel.

what is the delivery charge?

Depends upon the order amount and type of delivery.

How many pads are there in this packet of 180mm?

Can it be used while swimming?

I don't think so u can wear any sanitary pads while swimming but u can try if u like...

Are these pad are good after delivery for heavy flow?

Not at all

How many piece?

Check Description on Product Details

Is this cotton pads?

Yes

Does it have a Fragrance?

NO

What do u mean by 3D breathable layer feature?

The pad materials consist of a friction reducing, breathable top layer. 2 middle layers provide breathability and moisture transport. The main layer is where the magic happens.