Genuine Full Grain Leather is used for the bag. It's a Soft and supple leather that ages beautifully as it wears. To give you more security an outer cover top fold-over flap prevents an easy opening. .The bag has an detachable strap. For detachment, stainless steel snap hooks are used because these are durable and easy to use. YKK well known long lasting and durable zipper closures ensure security of your essentials..