A COMBINATION OF 5 4&3MM DOUBLE LINED NEOPRENE WITH MAUSERED STITCHING THROUGHOUT MAKES THIS WETSUIT SUITABLE FOR YEAR-ROUND USE IN COLD WATER CONDITIONS. MAUSERED STITCHING IS THE STRONGEST WETSUIT SEAM AVAILABLE. FEATURES: 5MM TORSO 4MM LEGS AND LOWER BODY 3MM ARMS AND SIDE PANELS. 100% MAUSERED STITCHING WITH STRETCH TAPE ALL NYLON LINED NEOPRENE FOR MAXIUM WEAR ADJUSTABLE COLLAR SYSTEM NON CORROSIVE PK ZIP & VELCRO ZIP LOCK DURATEX KNEE PADS NO UNDERARM SEAMS PRE-BENT KNEES AND ELBOWS FREE FIT ANKLES WITH RAW EDGES CERTIFIED UPF 50+ MAXIMUM UV PROTECTION FOR OUR WEBSITE WE RECOMMEND TO GO UP A SIZE.