Noun and の adjective
はんそで
半袖で寒くない？
Aren't you cold in a short sleeve top?
コンマリの本を読んでから、半袖のシャツは一枚しか持っていない。
After reading Kon Mari's book, I only own one short sleeve shirt.
今年のファッショントレンドは半袖の革ジャンです。
This year's trending fashion is short sleeve leather jackets.
Half sleeves is just another name for short sleeves.
This word uses the on'yomi reading for 半 and the kun'yomi reading for 袖. You've learned them both already, so you should be able to read this word.