A fun way to fasten a diaper! The Boingo is a innovative fastener that is simple and cute! No old fashioned pins needed! Just hook on one side of the diaper, pull and grip, and you're done! Boingo Fasteners grip on the sides of the diaper. This prevents uncomfortable compression on the babys tummy and delicate areas. Boingo does not need a cover, because of its patent pending curved grips. Boingo stays put and does not pull off during play like other products on the market. The curved grips also help prevent accidental injurys like poked fingers and scratches. Fasteners come in 2 per package.