The size is determined with the sock you'll actually be wearing. The too tight shoe part presses against the foot and makes it difficult to move, and the too loose leaves the foot unstable when coming out of slime. Try squatting, kneelifting and a few steps; if the fabric pulls or the boot detaches from the heel, look for another size. The sock should lie without thick folds that change the feel in the shoe part.
Draught boots are logical when the water stays below their upper edge and the movement is short. Fishing draught overalls give higher coverage, but require careful consideration of the bottom and draft. Do not enter where you do not see a stable foothold, and do not let the upper end be flooded. On an uncertain base, back off, because neither height nor insulation replaces a stable pitch.
For a long session, pay attention to how the gear stands when sitting, bending over, and climbing up the shore. Compact folding facilitates transportation, but does not compensate for incorrect size. Keep sharp tools, stands, and other hard objects separate so they don't pinch or injure the surface during carry.
After use, wash the mud with clean water, drain the equipment and stretch it in an airy place, away from direct heat. In boots, inspect the soles and area around the folds; at the overalls check the places that were under the most pressure. Only take a dry kit and don't put heavy luggage on it.
Before taking an outing by an overgrown or muddy shore, first specify how far you will tread and direct your choice to Boots and overalls. For other clothing and protection at different times, review Clothing and equipment for carp fishing. Finally, check the required small items in the general group Accessories for carp and bottom fishing.