rubber boot
US /ˈrʌb.ər ˌbuːt/
UK /ˈrʌb.ər ˌbuːt/

1.
a waterproof boot made of rubber or a similar material, typically worn in wet conditions
:
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She put on her yellow rubber boots before stepping into the muddy garden.
•
Fishermen often wear tall rubber boots to keep their feet dry.