The official Floss Like a Boss gymsac. Available in a variety of bright and contrasting colours, this Floss Like a Boss gymsac is perfect for kids who still, to this very day, love to do the Floss dance. Having taken the world by storm back in 2018, children all across the nation can still be found performing the dance to this very day. With its 210D polyester construction (that's water resistant) and reinforced, chunky drawcords, this bag is perfect for kids heading back to school this year as it will protect from knocks, bangs and even the elements.