There's nothing like maintaining high-quality leather. I bought my Occidental tool bag setup last year and I expect these to last for a big portion of my career as an electrician :
TRAILSIDE Tool Tote Bag, Genuine Leather Bucket Maintenance Pouch, 23 Pocket Organizer for Hand Tools and Supplies, Heavy Duty Electrician, Hvac, and Plummer, Handyman Open Top Carrier - Amazon.com
Seven Bag Framer Set 5089 - Occidental Leather | Official Site
TRAILSIDE Tool Tote Bag, Genuine Leather Bucket Maintenance Pouch, 23 Pocket Organizer for Hand Tools and Supplies, Heavy Duty Electrician, Hvac, and Plummer, Handyman Open Top Carrier - Amazon.com