Lululemon black onesie. Literally such an easy outfit and makes you feel slimmed out. Easy to throw over a sweatshirt and wear as leggings. Or nice to add sweatpants and bundle up in the winter, too. Some colors are on sale!! Lululemon , black workout outfit , ootd , outfit , workout , leggings , on cloud , sneakers , gym LTKfitness LTKstyletip LTKworkwear