I use this to carry my 15.4 inch laptop in. I absolutely love it. The leather is soft and very durable. The case is big enough for a 17 inch laptop. Mine has extra room to put my mouse beside it. The arm strap is perfect for me. On the longest length my arm rests on top of the case. On the shortest length the case us right under my arm. Genuine leather absolutely! The smell of leather filled the air as soon as I opened the bag! This case has plenty of extra storage space. Great bag. AA++