This is the DUI Weight and Trim System for Dry Suit Diving Holds up to 40 LBS of Weight Features: Can hold up to 40 lbs of weight Available in 3 Sizes When measuring for max waist circumference, be sure to include drysuit and any undergarment layers you will be wearing. Get the weight off your back and increase your diving comfort with the DUI Weight & Trim System. The Harness Allows you to comfortably wear up to 40 pounds and lets you adjust the weights up and down, forward and back so you can put your weights right where you want them.