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Business Notebook Backpacks

Item No.:MB006070
Size: 41*28*17cm
Material: 1680D + polyester
Comfortable shoulder strap
2.5cm high density anti-shock foam backer with cool-dry and breathe freely
Custom design, logo, size etc Color: green, black, grey

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Brife of business notebook backpacks:

Size: 41*28*17cm

Material: 1680D + polyester

Comfortable shoulder strap

2.5cm high density anti-shock foam backer with cool-dry and breathe freely

Custom design, logo, size etc

Color: green, black, grey

 

Specification of business notebool backpacks:

This business notebook backpacks bags with novel design, made of 1680D durable material. Big capacity is no problem to pack 15’’ laptop inside, also a layer for ipad which top on the laptop. Its a new deign computer backpack for businessman. Multiple notebook backpack for laptop, ipad etc, 2.5mm high density PE foam to avoid the shock and hurt the laptop. 

Backpacks in general fall into one of four categories: frameless, external frame, internal frame.

backpack size -5



backpack capacity -6


Frameless : 

The simplest backpack design is a bag attached to a set of shoulder straps. Such pack are used for general transportation of goods, and have variable capacity. The simplest designs consist of one main pocket. This may be combined with webbing or cordage straps, while more sophisticated models add extra pockets, waist straps, chest straps, padded shoulder straps, padded backs, and sometimes reflective materials for added safety at night. These packs are generally produced inexpensively. 

Some outdoor packs, particularly those sold for day hikes, ultralight backpacking and mountaineering are sometimes frameless as well.

 

External frame: 

It is typically made from aluminum, other lightweight metal alloy, and recently reinforced synthetic polymers or plastic and is equipped with a system of straps and tautly-stretched netting which prevents contact between the metal frame and user's back. In addition to comfort, this "stand-off" provides the additional benefit of creating air circulation between the frame and the wearer's back. For this reason, external frame packs are generally considered to be a "cooler load" than internal frame designs.

 

Internal frame:  

This is a recent innovation, invented in 1967 by Greg Lowe, who went on to found Lowe Alpine and Lowepro, companies specializing in backpacks and other forms of carrying bags for various equipment. An internal-frame pack has a large fabric section around an internal frame composed of strips of either aluminum, titanium or plastic, sometimes with additional metal stays to reinforce the frame. A complex series of straps works with the frame to distribute the weight and hold it in place. The internal frame permits the pack to fit closely to the wearer's back and minimizes shifting of the load, which is desirable when participating in activities that involve upper-body movement such as scrambling over rocky surfaces and skiing. However, the tight fit reduces ventilation, so these type of packs tend to be more sweaty than external frame packs. The internal construction also allows for a large storage compartment; a few lash points (including webbing loops and straps for sleeping bags and other large items) may be present, but as the frame is completely integrated, it is difficult to securely lash larger and heavier items which do not fit inside the compartment to the outside of the pack. Internal frame packs originally suffered from smaller load capacity and less comfortable fit during steady walking, but newer models have improved greatly in these respects. In addition, because of their snug fit, the improved internal frame models have largely replaced external frame backpacks for many activities.


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