A highly regarded and very popular entry level wetsuit. Warm flexible and durable the Billabong Intruder provides high performance at a low price. :: Boy > Wetsuits. Pre-bent knees: Hight impact protection that is fitted and not bulkyMen's wetsuitThickness: 5/4 mmAX2 Airlite Superflex: Top quality and light-weight combined with silk\n touch stretch outer jerseyGBS: Glued and blind stitched seams that reduce water entryGlideskin Collar: Comfortable. water tight collarFull Back Zip: For easy entry and with a water resistant YKK zip Size: 09-10 YRS,11-12 YRS,13-14 YRS,15-16 YRS.