Waterfield Dash Sleeve
The Waterfield Dash Sleeve for the 10.5-inch iPad Pro is an excellent option if you want to carry your iPad Pro around along with a few accessories.
In addition to holding the bare iPad Pro, you can also get one with a configuration to hold the Smart Cover or Smart Keyboard.
Like the official sleeve, you can't use your iPad with this on it, but it's perfect for carrying alone or sliding into a backpack.
Available in a wide array of colors and in a horizontal or vertical configuration this customizable case is also cheaper.
$89 at Waterfield