Quick weight vest for cheap using basic materials.
Sand used 23.7 lbs (CAD $3.60 for 30kg)
Large freezer bags (To make heavier, use larger bags) $2.19
Duct tape 1-1.5 Large rolls ($8.00 or lower)
Fill bags with sand (doubled bags), remove the air by squeezing and lay out in a vest pattern shown. Make the shoulder parts a bit longer.
Tape front top to bottom joining the bags. (duct tape sticks well to the plastic)
Do the same for the back and tape down the bag openings.
Cover with tape (not completely necessary, but will add strength).
Add a belt centered and tape down. (make sure it's long enough)
Try out the fit.
Add some cloth coverings for the neck sides so the tape doesn't chafe. (I used some cotton canvas I already had.)
If your going for a specific weight, you might want to weigh the sand beforehand.
Mine was a little light, so I added another bag to the front and back.
Step 8: (optional 2)
Use this as a base and add a cover. (I used an hammock duffle bag which fit fairly well)
Done. Time for some dips.