DLO’s hunkydory StrapWrap is a classy universal neoprene case latches to most bag straps, allowing users to store iPods, cell phones and other cool tools  so that you don’t have to dig into your backpack each time you need something. The StrapWrap provides an extra-wide Velcro fastener which secures devices neatly fastened to a strap, while cushy neoprene shields most of the hidden devices. The lovely StrapWrap sells for $20 and affords  a main pocket and an extra pocket, capable of fitting in any device up to 2.5″ in width.

To be perfect, It should allow swimming….