Questions about Swiffer Duster XXL Kit

Good day, We would like to know - what exactly this XXL set contains, and what the XXL specification specifically refers to here. - whether the minimum quantity of 30 (and the crotch size order quantity of 30 equally) is a typing error, as it is rather unlikely for households to like to pay just under CHF 300.00 for it (and to stock so many). We would be very grateful for any answers or corrections. Have a nice sunny Sunday!