A highly regarded and very popular entry level wetsuit. Warm flexible and durable the Billabong Intruder provides high performance at a low price. :: Men > Wetsuits. Glideskin Collar: Comfortable. water tight collarZG400 Superflex: Strategically placed highly flexible neoprene panels\n under arms & shouldersGBS: Glued and blind stitched seams that reduce water entryFull Back zip: For easy entry and with a water resistant YKK zip Size: X-Small.