4mm new high-density neoprene maintains optimal thermal insulation but weighs 50% less and is significantly softer than any traditional dry boat suit material, making it the perfect travel companion wherever you may dive. High density neoprene is an intermediate density between pre-compressed and standard neoprene and gives Everdry4 its 'revolutionary' status. Soft & comforatlble like a wetsuit but warm and water tight like a dry suit. Light for boat in weight but heavy in insulation properties.