POTTSTOWN, Pa. (AP) — A suburban Philadelphia middle school’s ban on a popular type of fur-lined boots isn’t about fashion, it’s about cellphones.

Pottstown Middle School parents were informed of the new ban on the unlaced boots on Wednesday.

District community relations director John Armato tells the Pottstown Mercury (http://bit.ly/wwTP1g ) students are using the boots to hide cellphones and bring them into class. Current school policy allows students to bring their phones to school but requires them to be kept in their locker during the day.

Armato says the ban targets the unlaced boots with fur or faux fur lining made by footwear companies including Ugg. It goes into effect Monday.

Principal Gail Cooper says students can still wear the boots to school, but must remove them before going to class.