Bestdive Adjustable Neck Weight Pouch $19.00 Bestdive Adjustable Neck Weight Pouch This adjustable freediving neck weight is a pouch with velcro pockets that you can fill with lead balls or other weights like marbles. The adjustable neck weight comes in two sizes and in 4 colours. The large size is 58.5*8.5cm. The small size is 58.5*6.5cm. The freediving neck weight is suited for both pool and depth disciplines.