The Deuter Pulse One Pack is an incredibly lightweight waist pack that is a comfortable & convenient way to be able to take a drink keys mobile phone some change & a few other personal items when you are walking running Nordic walking & cycling Made from lightweight nylon ripstop & Microrip fabrics to ensure this little pack is strong & abrasion resistant it has a breathable foam back & mesh wings for an incredibly comfortable wear making it an ideal solution for hydrating on the go