Clogs that are nailed to a shelf (approx. 30 by 40 cm) and with which the gardener tamps the soil after sowing. The clogs are sometimes replaced by a shelf with straps that you fasten around your shoe; or fitted with ropes held taut by hand (1).
The peat-cutter uses such clogs to tamp the spread wet dredge spoil to squeeze the water out before it is distributed with the mud-marking iron.
To walk on muddy surfaces, trips are attached under the shoes or boots; there the aim is to increase support. [MOT]
(1) Eg. CROMPVOETS & VINEYARD ep.2: 169.