waders; chest waders; fishing waders
Waterproof pants with attached boots, typically used by fishermen. The term specifically refers to the full-length, boot-integrated type.
Before going river fishing, I put on my waders.
Waders are designed to keep water out up to the waist.
長靴 refers to any long boots, while 胴付長靴 specifically means waders with attached boots that extend up to the chest or waist.
Compound of 胴 (どう, 'torso'), 付 (つき, 'attached'), and 長靴 (ながくつ, 'long boots'), literally 'torso-attached long boots'.