Scott Scooter Sowle wrote an answer about Deuter ACT Trail 38 EL Backpack - 2320cu in on July 13, 2014
The EL (extra long) is designed for those who are 6' to 6' 6" with a torso length range of 20" - 24". If you have a long torso length at 5' 10" it may work ok. You may want to also look at the Deuter ACT Trail 32 which will accommodate a shorter torso length with the same great features... http://www.backcountry.com/deuter-act-trail-32-backpack-1950cu-in?
Enjoy the Summer!!!