The teenager dances to the tune before hitting one breast after the other in quick succession in time with the beat.
The leggings have a dart-like waistband, which points directly down at a ruched seam that cuts straight through the backside.
User raniaclayton posted a sequence of herself trying them on, then strutting over to the kitchen where her husband is eating dinner to a soundtrack of Christmas music.
After months of sitting on our tushes, the Amazon leggings feel like the strangest mix of trying too hard and totally giving up on style.
They proudly wore sweatsuits to the grocery store, pairing slouchy with matching masks.