summer kimono, short clothing
袢 centers on lightweight, short clothing worn in warm weather, especially a summer kimono. The idea is a garment that is brief and informal.
袢 combines the clothing radical 衤 with 半, which likely contributes the sound ハン and may suggest the idea of something half-length or short, fitting the meaning of a short summer garment.
The clothing radical 衤 beside 半 (half) suggests a garment that is only half-length: a short summer kimono.
For ハン, imagine a half-length summer kimono worn by a character named Han: Han -> ハン, and the short clothing is perfect for warm weather.
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