There are many scaling bags about but we like this one at Salt Guide.
They are well made with small mesh reducing break out. Other features include a strong 6mm danline rope and a stainless swivel which allows you to tow the scaler bag and spin without the rope twisting up.
A stainless ring also closes the bag eliminating the need to tie the bag shut and it will not open until the rope is fed back through the ring, plus there is a float at the rear of the bag so if you don’t tie it off correctly the bag will not sink to the bottom. The added benefit of having the float attached to the rear of the bag is that it does not impede the scaling process by being in front of your catch.