Multiple layers of external storage makes space better organized and more accessible so you can quickly find what you need, when you need it Semi-rigid shell is encased in a combination of our new super durable and stylish Tuf-Tek material and our 1680 ballistic nylon Rigid supports in the main walls of the bag make this the most protective soft- sided kit in the Cramer line. It also helps the kit keep its shape and keep it looking new Rounded corner design gives a large, more aerodynamic and sleek look