This full sheet of perforated neoprene is double lined with stretch nylon on both sides.
This type of lining is sometimes known as double lined, Nylon II or Nylon/Nylon.
The rubber inside has perforation in it to offer a degree of ‘breath ability’. Both air and water can pass through the perforations.
If you order more than one metre we will keep it as one continuous piece. If you would prefer sepreate sheets just ask in comments section.