noun
sedge hat; sedge-woven hat
A traditional Japanese hat woven from sedge or bamboo, often wide-brimmed and used for sun and rain protection.
旅人は菅笠をかぶって雨をしのいだ。
The traveler wore a sedge hat to keep off the rain.
Compound of 菅 (suge, 'sedge') and 笠 (kasa, 'hat'). The reading すげがさ is a straightforward combination.