Tube-shaped weightbelt?

[allinapnea]

Hi, I searched, but couldn't find this yet... I saw a freediver wearing a weightbelt that seemed to be very soft, made of rubber and its shape was like a tube, filled with lead (I suppose). It was hanging around the freediver's waiste like a normal weightbelt. The two ends of the "tube" where held together by some metal thinge/mechanism.

Is there anyone who knows whether this can be bought, or was it a self-made thing? It looked professional to me...

Thanks in advance!

 

[Apiek]

Haven't heard of a belt like that, but it does sound like a DYI neck weight which could be easily adapted to one.

Here's the link Making a freediving neck weight it was posted originally by martin366, great find!

Cheers