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Congrats Pumpkin looks adorable!
I hadn't heard of that product before either, I can't see from the photo what's in it & the most I could find online was "varied mix of birch bark, birch twigs, light wood chips, hay, birch leaves and moss" which does sound very much like some of the Hugro mixes I've used, not as a main substrate but as an addition, I like them but as Serendipity says do check for any sharp or pokey bits before you put it into the cage.