Have had this Tumi bag for several years and it used to be my go to bag for travel since I felt it was the right size and had the right configuration to get me where I needed to go with a minimum of fuss.

First it's by Tumi.  Don't think you need more than that to describe the quality built into it.

Second, it's made mostly of their old school ballistic nylon.... wears like armor but is relatively light and easy to keep clean.

Third, it's got a great large and effective magnetic flap closure in the front.  Always keep my bag shut but accessible by me.  Soft Napa leather inside in 2 places.... on the rim of the main section and keeping a small hidden pocket covered.  Leather trim on the sides of the bag

Cross body nylon strap is in great shape and easily adjustable to suit your needs.

Also, it has a detachable 6" x 8" ballistic pouch and great interior sections in the main storage area, along with a leather card holder and the Tumi finder.   Large outer full length zippered pocket the width of the bag on the back.

Dimensions are:  15" wide by about 12"high.  Depth at bottom of bag is 6"

It's model number 436703.  Don't think it's made anymore or has much availability.

Email me with any questions and thanks for looking.