I bought this from eBay and I've found the extra zips a godsend in making the cover that much easier to use - and hence I'm using it more often. This is a simple design change that Brompton should definitely consider in their next iteration of their cover.



The top of the bag has two zipper, you can control two openings, a group of bicycle seat out of the bag.

Another group in the middle of the opening, to facilitate the hand into the bag, lift the bike. Can be inserted into the front pocket pull the bike in front of the opening.

The anti-dust cover can be placed in the bike body, and convenient transportation to use.
anti-dust cover and dust bag sets.

The anti-dust cover can be placed in the bike body, the front end of the anti-dust cover reserved for a handle for easy out.

Brompton Folded Light Anti Dust Cover New Vers with Hand Made Paint Free SHIP | eBay

A downside may be the glaring Brompton logo imprinted on the side, though anyone who knows what a "Brompton" is would already be privy to that suspiciously Brompton-like shape.

Also, no saddle bag included - though it seems it can be inserted into the hollow top tube for safekeeping.