laddering in a sentence

Examples

1. In KS4, girls are to wear a navy blue cardigan, a navy blue jumper with the school crest ( optional ), a blue blouse ( in the summer term : worn without a tie ), or a winter shirt alongside a house tie-girls are notified of their houses before beginning the school ), navy blue tights ( preferably 60 dernier to avoid laddering ) and black shoes.
2. In KS3, girls are to wear a navy blue blazer with the school logo on the chest pocket, a navy blue jumper with the school crest ( optional ), a blue blouse ( in the summer term : worn without a tie ), or a winter shirt alongside a house tie-girls are notified of their houses before beginning the school ), navy blue tights ( preferably 60 dernier to avoid laddering ) and black shoes.