Gird it before battle

Consisting of a thick, rubbery chest strap and tracker "bug" unit, the Under Armour Armour39 is no casual fitness gadget.
Photo by: Sarah Tew/CNET

Flat but wide

The Under Armour Armour39's strap is flat but as wide as ones you'll find on backpacks.
Photo by: Sarah Tew/CNET

Over-the-top design

With yellow accents and gaudy paint job, the Under Armour Armour39 has a design aesthetic that's not for the timid.
Photo by: Sarah Tew/CNET

Big, bold, but light

The Under Armour Armour39's strap is large but surprisingly light and comfortable to wear.
Photo by: Sarah Tew/CNET

Replaceable, not rechargeable energy

The Armour39 bug tracker uses a watch battery that's replaceable, not rechargeable.
Photo by: Sarah Tew/CNET

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