A secure weight belt or weight harness is a critical safety item for any diver, it must be able to be released quickly in an emergency allowing you to drop your weights but be secure not to come loose during normal diving activities. Those shown here are the best available.
Weightbelts are the most common ways of adding weight to your setup and come in two types: 2" webbing belts where you thread lead blocks onto it and it's held in place with a simple quick release buckle. Pocket weight-belts have the same quick release buckle but have multiple pockets that you can put your lead into including shot lead.
Weight Harnesses hold the lead around your waist in pockets and have shoulder straps to hold it up so the lead doesn't slip down your waist.