I think the $99 item is the Cargo area floor mat. A Cargo net is available for $45 and a barrier that fills the gap between the seats for $99. My dealer did not have any of these in stock when I picked up my Volt.It is an accessory that costs $99 extra, unless you ordered it with your car and already paid for it.
I also ordered the mats, cargo net and storage unit. I've been told they're still on backorder. Even my Volt Advisor was aware of the situation and is investigating. Glad to hear your opinion of quality! Thanks!BTW, I did get both the rubber mats and the storage unit for between the seats, the mats were much better quality than I expected - thick rubbber with channels to catch dirt etc and the volt logo. Storage unit for between the seats is nice but more 'cute' than super needed/useful