A spare inner so if you puncture the football you can easily pop in another bladder and re-inflate it. We used a regular foot pump which we picked up for a few quid at our local hardware store. It’s big and it’s beautiful, how can you possibly resist it?
Note: We joyfully inflated this monster, all ready to take it outside and play around with it, then realized how stupid we’d been. It’s so massive you can’t get it out of the door! Do make sure you only ¾ inflate it, then top it up once your outside!