The Air Flow Cover is a lightweight, breathable waterproof fitted diaper cover. Available in 6 sizes. The Air Flow cover is to be used with either the One Size cloth nappies or Sandys cloth nappies to create a highly breathable, leakproof nappy system. It features adjustable snaps at both the waist and legs for a secure, tamper-proof fit. Gaps between the snap closures increases air flow, which help regulate the temperature inside the nappy!