Strong & Durable. Olympia heavy tool backpack is made of water resistant 1680D ballistic weave material and 600D Oxford cloth, which make this tool bag backpack strong and durable. Backpack tool bag equipped with a double slider design zip, which is smooth and easy to use Spacious Space & Multi-Pockets. Our tool back pack demension: 17.5” H, 14.5” W, 7.25” D, with 17 pockets, and spacious interior space to accommodate electrical tools, power sockets, heavy-duty hardware and so on. Tools bag with external rings for fixing various pliers and metal hook rings for hanging water bottles or flashlights Soft Lined Shoulder Strap Design. The soft-padded shoulder straps design of the technician backpack relieve the pressure of your shoulders when carrying heavy tools, keeping your shoulders comfortable Bottom Plastic Shell and PE Board Support. Tool backpack for men come with curved and durable wide bottom keeps backpack upright, provide extra comfort when wearing and protects against the elements Multiple Usage. If you are a construction worker, technician, or electrician, when you need to work, you can take out neatly arranged tools from your backpack and use them, which is very convenient. When the work is completed, you can carry the toolkit on your shoulders, which can give your hands a rest