The APNEA 3-45 is made with YAMAMOTO neoprene sandwich 45 structure. Material consisting of Multi-layer structure in sandwich composition. The first layer made of 1mm of Yamamoto 45,the middle with a special fabbric produced in exclusive for ALPHA CORPORATION. The third layer of YAMAMOTO 45 neoprene, The structure produce hight thermal protection,best confort,better compression resistence against water preassure and provides extra freedom of movements.