The mirrorless mindset has come home to me as a 2 part phenomenon:
A. Less weight in the bag
B. Using more primes
It’s true. When I shoot an event, the Nikon Full Frame DSLR’s still come out and the trinity of lenses (14-24, 24-70,70-200) are at the ready. They travel protected in a ThinkTank bag, and are built like tanks.
On the street, I was looking for a smaller, high quality rig, that I could carry easily in any bag.
Leica is out of my range, and the Fuji X-T1 system is just right (full review coming soon) Still not an inexpensive alternative, but built well. And I want to keep the gear in mint condition.
I am prone to use a messenger bag for easier access to the camera on the street. The Thinktank CityWalker is my bag of choice, and i remove the insert to reduce bulk.
When I fly, though, more gear ends up in the carry on bags, both roller and “personal bag”. Needed protection.
Miggo has had a neoprene camera wrap, designed as a camera strap as well. I’ve liked it as a camera protector, and the wrap design protects your DSLR from bumps and scrapes, although you are either putting primes or smaller zooms on the body. Admittedly, I use it only for transport and protection, not as a camera strap.
They also have a wrist strap version for mirrorless, called the Grip & Wrap, and it fits my Fuji X-T1, even with a 56mm 1.2, perfectly.
This is how it works:

https://vimeo.com/114394526

You can secure your camera with a the 1/4-20 tripod connector, and it is a safe, non marring, rubberized piece.
The wrist strap on this model actually fits great and is surprisingly comfortable while shooting. You can unwrap, shoot, rewrap quickly, and toss back into your bag. It is still a bit more material than I want on my hand while shooting on the street, but in other slower situations should work well. The tripod disk allow the whole unit to be put onto a monopod or tripod with ease.
OR… you can forget about the tripod connection and just have a great wrap for your camera.

That is my main use; Well made, fitted, protection. Here is my Fuji X-T1 with 56mm lens, wrapped up safe in the Miggo.

And opened up. The lens shade was not extended, but was reversed on the lens, ready to go.

Using your regular daybag or backpack, wrap up the camera and toss it in the bag,

When you have a combo of about $2000. investing in a camera lens combo, $40 is a small price to protect that investment. Order one (or two) right here.