Breaking the sound barrier

Some students wear their PE attire to school on days when they have PE. DS has to bring his to school to change so I decided to make one for him to store the PE attire 'cos his previous one had teddy bears which isn't so suitable in secondary school, ya?. He chose this cotton twill from Spotlight which we bought for a really great price during the massive sale just past. Light blue cotton cord and black cordstopper.