After some research, I unfortunately did not find a bag for this product. I leave the question open if someone has found a suitable bag and wants to answer :)

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I'm afraid I don't know. This is a discrepancy at Galaxus....

??? No??? The real answer is yes. At least my unit came with a pump with 2 sides, inflate/deflate

Please contact our customer service directly for a spare parts enquiry so that we can check and help you accordingly: https://helpcenter.galaxus.ch/hc/de/requests/new

Unfortunately, we currently have no information on when the item will be available and when we will be able to deliver it. As soon as something changes in this regard, we will post it here. Sorry.