white shoes (for summer)
Refers to white shoes typically worn during the summer season in Japan, often as part of school uniforms or formal summer attire.
夏になると、学校では白靴を履くことが多い。
In summer, students often wear white shoes at school.
Compound of 白 (しろ, 'white') and 靴 (くつ, 'shoes'). The reading しろぐつ is a straightforward combination.