Although it’s the largest of the physical items that comes shipped in the box, PDP’s armband is pretty forgettable. For the most part, it’s made of raggedly cut neoprene, with a Velcro strap on the right side that loops around through a slot on the left; this enables the band to adjust to the size of your bicep. The face of your iPhone or iPod is covered by clear plastic that still allows you to control the screen, and is surrounded…