We developed our single stroller rain cover to fit both of our current single stroller models: The Tour+ (XL1) and The Traveler (XLC). We sell them separately just to avoid confusion.
To order a rain cover for The Trio+ (XL3), you will need to purchase The Twin+ (XL2) rain cover and The Tour+ (XL1) rain cover.
To order a rain cover for The Tribe+ (XL4), you will need to order 2 Twin+ (XL2) rain covers.
To get the proper fit, make sure to remove the parent cup holder if applicable.
Then route the handlebar through the top opening of the rain cover.
Then, route the plastic fold locking latch through the cover in the specified are on the side of the handlebar if applicable.
Then, route the cup holder attachment knob through the other side of the rain cover on the other side of the handlebar and re-attach the parent cup holder if applicable. This allows the rain cover to lower and sit down on the top of the stroller properly.
Lastly, use the velcro attachments at the bottom of the rain cover to securely attach it to the top of the front wheel housings if desired.