A snorkeling belt is a very useful tool. We have used them for years. Primarily, it attaches our waterproof valuables box to us so we can carry our keys, identification, cell phone, etc. and not worry about them being stolen out of our car or from a bag we leave on the beach. But it is also great for attaching snorkeling shoes to for those rocky water entrances. We also hang our cameras from the belt when we need two hands to swim.
Through trial and error, we have found that the best belt is an elastic one. It stays put instead of sliding up our bodies in the water. It has the added benefit of keeping our rash guards from floating up too.
The good news is, an elastic snorkeling belt is easy and inexpensive to make. You can probably get the supplies at your local sewing or crafts store, but you can also order it all on Amazon (links below).
You will need 1 inch Non-Roll Elastic. The Non-Roll type is a little less stretchy. The kind we got was by Dritz. It was 2.5 yards long and plenty for two belts.
Next you need a 1 inch plastic quick release buckle. To secure the ends of the belt you need two triglides, one for each side. You could sew one side and keep the other one adjustable with one triglide if you prefer.
Then just cut the elastic to the length you need for the belt and burn the ends with a lighter to keep them from fraying. You will need to make the belt tighter than you think because it will stretch.
If a 1 inch snorkel belt seems too narrow for you, you can do this with 2 inch wide elastic, just make sure you buy your buckle and triglides in 2 inch sizes as well. You will also need to up-size the smallest carabiner so that it will fit on the belt.
Your waterproof box needs to have slots for a belt to go through. If you size your belt up, make sure it can accommodate the wider belt.
Notice in the pictures the Nite Ize S-Biners we use. They are strong plastic with stainless steel spring gates. They don't have the corrosion and failure problems in salt water that we have experienced with other carabiners. They also make all stainless steel ones which would work if you prefer.
The larger ones we use for attaching our snorkeling shoes are size #4, and the smaller ones we use for attaching cameras, etc. are size #2. The double s-gates are nice for keeping the carabiner from falling off when you attach things.
To the #4 carabiner for our shoes, we added a length of webbing (small rope would work too) so that we can loop it through the shoes and then clip the carabiner to the main belt.
Use a snorkeling belt to keep your hands free while snorkeling. It can carry your waterproof valuables box, your snorkeling shoes, your camera and other accessories when you don't need them. Make your own for your next snorkel!