Rig'Em Right® Strap Weights stay where they're dropped. For storage, simply wrap the line around the keel and secure the flexible Strap Weight to the decoy by bending it around the decoy's neck.
These seem to be a better deal than all the other strap weights I've found. I bought the 6 oz. weights. Holes are a little small if you're using the magnum line but you can easily make it bigger. The free shipping made this an even better deal.