A fun way to fasten a cloth diaper! The new and improved Boingo is a innovative fastener that is simple and cute--no old school diaper 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. The curved grips also help prevent accidental injuries like poked fingers and scratches. Sold in packs of 2--one for each side. The Boingo works best with cotton prefolds. Phthalate and BPA-free. Made in Taiwan. One size fits all.