It does exactly what it should to do, providing extra absorbency for my heavy wetter Doubled in half and propped inside the GroVia stay dry insert it doesn't make the whole nappy too bulky.

When washed in, they soak well. And therfore it takes a good time for these to dry. Personally, I prefer the grovia stay dry or no prep alternative, as they have a fleece coating that keeps baby's bum dry, this one does not.

Like them

These are ok, but the hemp ones are better. These are a bit long for the GroVia nappy shell even when used on the longer settings, and they take a while to reach full absorbency. But they have reduced night-time leaks, which is the key thing,

A nice slim booster the only ones that are slim enough for grovia. Only draw back I find them a little too long for the nappy even when on largest setting. I have used them in both hybrid and AIO and it doesn't add any bulk. The absorbency is great for heavy wetters but does need time to dry the stay dry are much faster. But if you only want natural fibers this is super quality.

GroVia are our "workhorse" nappies. We use them everyday and (almost) all day.

The boosters fit perfectly under the layers of the stay-dry soaker pad or layed over the organic cotton soakers and also the AIO nappies . Special performance for heavy wetters in those hours that we just know that they pee more, for naps or overnight - we use 2 boosters at night. They are so thin yet so absorbent!) that don't add much bulk. Perfect when out of the house when we will probably need to extend the nappy change.

Very convenient also for tinny babies to "fill" the eventual gaps that would cause leaks. Perfect and organic, so you only have natural fibers against your baby's delicate skin.
Though be aware that you must change your baby frequently - every 2/3 hours. We have 8 boosters in total and don't use them in every nappy change.