OK! I have to be honest, I have not worn the Jungle Chip Grey (yet!) but I have worn the Jungle Blue (purchased at the same time!) and I happen to have one small (but annoying) issue: the footbed of the shoe does NOT fit the inner sole properly and continues to ride up into the heel of the shoe. After taking about 10-12 paces, you feel the inner sole start to slip back under your foot and working its way up the back of your heel. This is an oddity that I have not experienced once with my 2 previous TropicFeel shoe purchases; so trust me when I say, this is not me trying to throw 'shade' on this brand! I have the back pack, 3 add-ons and now, 4 pairs of their shoes! But I have had to cut down the sides and ends of the shoe insert (inner sole) to make it fit properly...waiting to see if my current modification holds up.