A Cressi weight belt is often worn when spearfishing or freediving to offset buoyancy. Wetsuits are usually made from buoyant material, making it difficult to descend without extra weight. A weight belt along with led weighs helps you to sink.

Divers wear diver weighting systems, weight belts or weights to counteract the buoyancy of other diving equipment, such as diving suits and aluminium diving cylinders, and buoyancy of the diver.https://poolworldandfishingsupplies.com/product/cressi-weight-belt-nylon/