waterproof long boots
General term for tall waterproof boots, such as rain boots or rubber boots that reach the calf or knee.
On rainy days I go out wearing waterproof long boots.
Specifically refers to high waterproof boots used for fishing, working in water, or wading. Often hip-length or chest-high.
See also: 防水ズボン (ぼうすいズボン)
Waders are necessary for river fishing.
長靴 is a general term for long boots, while 防水長靴 emphasizes waterproofness and is often used for waders or heavy-duty rain boots.
レインブーツ is a common loanword for fashionable rain boots, whereas 防水長靴 sounds more functional and practical.
Compound of 防水 (waterproof) and 長靴 (long boots).