Carrying your computer in your hand can be cumbersome, use a computer bag instead. There are several ways to carry this bag, one of them being a detachable shoulder strap.
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Targus Work-In Essentials Case for Chromebook 11.6-Inch, Black/Grey (TED006GL)
Technoworld PLC
Targus TED006GL notebook case 29.5 cm (11.6) Briefcase/classic case Black, Grey
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