Big Kelty Serac with more weight in patches than most packs today have in weight. Big Packs, No Treking Poles, No Angel Trails, No Water Caches, No Internet Info, Only a guide book as big as the T.V. Guide. Half way into your trip , your rarely saw another thru-hiker if you weren't hiking with them. The people behind you didn't exsist, and you didn't exsist to the hikers in front of you. Very few " Female" thru-hikers in 70's or people of 25 years old in general. Someone over 30 was quite rare on a through hike back then. ( Sorry so blurring. No IS on my old Ricoh 35mm film camera!!)