12/01/2025
I want to talk about the materials of diving suits. First I will say about Seiko.
That material is exclusively for beginners, it has great thermal insulation properties, but if someone dives deeper than 20 m and I take them, that wetsuit goes down very quickly.
Heiva is probably the best known diving material. It has very good thermal insulation properties and good buoyancy in the dive, but it has a flaw. I can't wear it the second year, it gets too hard and collects. It shrinks in number.
Daivabo is a very soft material and remains soft the next year as well. But it's not that hot, I use it more in the summer months. So I will be using a 5mm daivabo which weighs the same as a yamammoto 45 3mm but lasts longer. Because, due to its greater thickness, it is more resistant to friction with shorts and damage to the elbows and knees.
I will talk about the Yamamoto 45. It is the warmest material on the market. It is extremely comfortable and remains so even in the following year. Personally, it offers excellent buoyancy if you adjust the weights on your waist properly. However, because it has strong positive buoyancy when it is brand new, I recommend wearing the jacket of the wetsuit with an old pair of pants for 4-5 dives before incorporating the new pants into your diving routine.
Let me give you an example of the thermal protection provided by these three materials.
A few years ago, I got three new 9 mm jackets: a Daivabo, a Heiva, and a Yamamoto 45, and I went diving.
I started with the Daivabo, and after about an hour and a half, I started feeling cold. Next, I used the Heiva and managed to last about three and a half hours. Then, I tried the Yamamoto 45 and didn’t take it off for three months.
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