CLC Custom LeatherCraft 1132 75-Pocket Tool Backpack - Durable Construction for Electricians, Plumbers & Contractors - Perfect for Job Sites, Workshops & DIY Projects

No other bag puts this many tools comfortably on your back. That said it could REALLLLLLY benefit from a hip belt like on a camping pack. If you're not careful, that weight can topple you like a drunk lumberjack.So here's a few tips for enjoying your high capacity tool bagPlace your heaviest, densest tools close to your back to maintain close to center of gravity and motion.Try to strategically place tools to nest them together inside when it's closed. Lumpy spots dont feel good on your back.Spray black flex seal all over the whole bottom and an inch or two up the sides, including zippers. Do three coats. This gives the bag a durable bottom for placing on rough surfaces. My first bag died from bottom trauma. I've had my second one longer and it's still tip-top. As for the bit about the zippers. They bend and mess up if you let the zipper go all the way down and the bag flop open. Binding with flex seal near the bottom prevents the zipper from opening that far and I've not had a problem. with bendy zip strips.Also on zippers. Get some silicon grease, like dielectric grease or super lube and smear that all into the zippers then work the zippers gently to get it all in there all nice. Now the stitching on the zippers lasts twice as long or thereabouts. reapply as necessary.You probably dont need flaps over most of the compartments inside. I cut them off with medical shears. Saves an ounce or two as well.Consider sewing in a patch of denim or softer durable cloth on the in-side fof the shoulder straps. This was also a wear point. I used strips of denim from old jeans to reinforce and they hold up fine.Use my tips on your first bag unlike me.