Anti-sinking feet—often called duck feet or sink-proof feet—are enlarged or specially shaped leg attachments that increase ground contact to prevent chair legs from sinking into sand, soft soil, or grass. They can be detachable or built into all-terrain designs.
Swiveling duck feet pivot so each foot can sit flat on tilted or soft surfaces (some designs offer up to 180° pivot). That adaptive movement helps each leg maintain contact with the ground, improving overall stability on uneven, muddy, or mixed terrain.
Available details recommend spot-cleaning: wipe dirt and mud from the feet and fabric with a damp cloth. For routine care, wipe away debris as needed to keep the feet and frame free of buildup.
Common designs are large duck-shaped feet and swiveling (180°) duck feet for all-terrain use. Some models also offer detachable anti-sinking feet to increase ground contact.
Anti-sinking and all-terrain feet help on soft or uneven surfaces—such as sand, grass, gravel roads, and muddy grassland—by increasing contact area and reducing the chance of legs sinking.
Listings typically describe metal frames—often aluminum—on chairs that include anti-sinking feet.