Making a Freediving Neck Weight

We often get asked about neck weights and I recently needed a heavier neck weight so I decided to create this post to show how to make one.

Below are two images showing the supplies needed.

The bag of lead pellets can be purchased at Bass Pro Shop or most other hunting stores. I bought a 25 lbs bag of very small pellets, but you might be able to find a store that carry smaller bags or maybe a dive shop that carry lead pellets. Bass Pro Shop also has the 1 inch buckles I used for my neck weight. I find 1 inch big enough to open even with cloves on and it isn’t as bulky as some of the larger buckles.

The scale, funnel and inner tube was purchased from Canadian Tire and the tape is from Home Depot. Only one color tape is needed, but I just wanted to show all the cool colors available.

The length of the bike tube should be the length of your neck circumference plus 20 cm. My neck is 40 cm and I cut off 60 cm of tube, which worked out nicely.

The thickness doesn’t matter as much, because the tube will expand, but I did made sure I didn’t buy a racing tire, which is very thin. The inner tube I bought can be used for a range of tire widths, ranging from 1.75″ to 2.125″.

There are a few ways of attaching the buckles and I have chosen the simplest solution. I find it has worked well on my last neck weight which has held up great for two years and show no signs of wear and tear. It can be a little difficult to get the tube through the ends of the buckle, but it only took me 5 minutes for the first and 2 minutes for the second buckle. Make sure to do the hardest of the buckles (if they are different) first, because the tube is easier to hold when it is empty.

There is a different way of attaching the buckle shown here from another blog: orangellous.

There are also great tips and discussions about neck weights at the Aida Canada Forums

The lead pellets are extremely small and hard to control, so make sure to do all the weighing and filling in a big plastic container. You should get some help from an instructor or experienced freediver with determining how much weight you need both with and without a wetsuit.

Filling the neck weight would have been hard without a funnel and I also found out that I needed a plunger. I am creating a 5 pound neck weight and all the pellets don’t fit in the tube without stamping them and expanding the tube a bit. I filled up about 10 cm of the bike tube and then used the stick to stamp the pellets. After stamping, the tube will mostly keep the thicker shape and more pellets can be added. I did this in 5 cm increments stamping each time and made sure I had about 15 cm of tube left after adding all the pellets.

The plastic clip was very useful when adding the second buckle. I placed the plastic clip tight to the pellets which allowed me to fairly easily add the second buckle and try on the neck weight for size. The size of the neck weight stretched out was about 47 cm, but bent it was only 43 cm and with tape it finally ended up a little over 42 cm inside.

 The spoon in the picture was used to scoop up a few of the small guys that got away from me.

Above is the neck weight before I taped it and before I shaped it. Make sure to spend lots of time shaping it so it will be symmetrical and  isn’t too thick in the sides. If you make it too thick in the sides it can be harder to get your arms correctly above your head for streamlining.

This is the final look of the neck weight with two layers of tape. I added two layers to make it as strong as possible and make sure none of the little pellets have a chance to get out and so water can’t get in.

This is almost identical to my previous neck weight which has been great so far. I will be using it for our freedive practices when I don’t wear a wetsuit.  I will be creating a heavier neck weight for when I wear a wetsuit.

I hope this will help you make your own, but I will also be posting these neck weights for sale, because several people have said that they prefer to buy them instead of making them.