■Weight

In deep diving, the water pressure causes bubbles in the wetsuit to collapse, and it cause a sudden decrease of buoyancy.

It is better to use a slightly lighter weight than normal diving so that diver will be neutrally buoyant at the seafloor.

■Suit

The heat of the sun does not easily reach deep places, and the water temperature does not rise.

Also, warm water is lighter and cold water is heavier, so deeper places always have lower temperatures.

In addition, in deep diving, the water pressure causes bubbles in the wetsuit to collapse, and the insulation effect is rapidly reduced.
A wet suit with a thickness of 5 mm or dry suit is optimum.

Before using a dry suit, take the dry suit specialty course and familiarize yourself with the use of dry suits.