The Flip nappy system allows you to choose which insert you use in your nappy. These are the Flip stay dry inserts. These are made of microfibre and are incredibly quick drying. They have a layer of microfleece on the top to keep baby feeling drier for longer. The pad comes with 2 lines marked on the pad and this is so you can easily fold the pad to the right length, these correspond to the lengths of the Flip wraps ie short, middle or full length.
Flips are a very economical system as you buy fewer wraps (the expensive part) than nappy inserts. The ratio of wraps to nappy inserts is 1 wrap to 4 inserts as a minimum. For a full time set this equates to 20 inserts (15day and 5 suitable for nights) and 5 wraps. If you have a very young baby you may prefer to get an extra wrap to allow for poo getting onto the wrap.
As the nappy inserts are just pads of fabric you are reliant on the flip wrap to keep poo inside so for a newborn especially a breastfed baby with explosive poo you'll likely to find you go through more wraps than you would with a shaped nappy but as long as you regularly wash your wraps so you don't run out this doesn't matter.