Ski Bag
The bag can carry up to four pairs of regular skis or two snowboards without risk of damage or soiling the passenger compartment.
The length of the bag plus the depth of the luggage compartment allows carrying skis up to 2.1 meters long. When carrying skis longer than 2.1 meters, the capacity of the bag is reduced, as it stretches and becomes narrower.

Loading. 1. Fold down the center armrest, unfasten the flap secured on top with hook-and-loop fastener, and lay it over the armrest.

2. Press button 1 and fold the cover forward.
3. Press button 2: the luggage compartment lid lock will be released.
In combination with the sliding loading floor:
slide the floor out, unlock the cover, and slide the floor back over the cover.
4. Spread the bag between the front seats. The zipper allows items to be easily loaded and removed from the bag and allows it to dry quickly.
To return the bag to its place, perform the procedure in reverse order.

Securing the Load. Secure the contents of the bag by tightening the strap with the buckle.
Secure the bag as described so that it does not slide out of place during sudden braking or maneuvering and does not pose a threat to passengers.
Before loading skis into the bag, clean them of dirt and snow. Do not allow the bag to be damaged by sharp edges.
When the luggage compartment lid is closed with the sliding loading floor, do not fold down most of the rear seatback: this may damage the cover.
Test yourself
A quick BMW X3 quiz: every answer comes with an explanation and a link to the manual page.