• works best for THIRD TRIMESTER tummies or if carrying a larger bump in the second trimester. The RAISED RIM is there specifically to SUPPORT YOUR HIPS particularly for smaller tummies to help avoid your back arching through the hole. As your tummy grows and fills the hole, you will find that it comes into its own, your tummy will be lifted and all the support and relaxation will kick in.  It is lightweight, easy to inflate by mouth or pump (not supplied), and perfect for on-the-go use.