Fast, secure and good looks, too!
The DiMarzio ClipLock Deluxe Italian Leather Strap is a comfortable 2" wide and utilizes a quick release clip system. A little finger pressure is all you need to release the strap and change from one instrument to another. Even with it's quick-change capability, it's one of the most secure methods of slinging your guitar or bass. Quality black leather.
Look good and be safe. Sling it into the cart now.