Can this suit be used for diving?
yes, it's excellent for travel or everyday use
yes it can be used for diving - I didn't keep this one, I think it was not a great fit in the hips for me or something - but I now wear a 3/2mm in another brand and its perfect for freediving in 68 degree spring water with a hood and socks. For scuba it would probably be better for warmer water since you are fully submerged, but this comes from someone who gets cold easily. Hope that helps.