DIFFERENCE BETWEEN HEIWA, NJN E YAMAMOTO 45
Heiwa: high density neoprene suitable for very deep dives, not particularly soft and elastic like the others but resistant and cheaper
NJN: medium density neoprene, very elastic, suitable for deep dives thanks to the thickness memory, warm and robust
Daiwabo: high density but more elastic neoprene than heiwa, suitable for deep dives, warm and robust
Yamamoto 45: the most elastic and softest of all, top model of the Yamamoto line, it is super comfortable but more delicate and more expensive