James is wearing his mask white side out then it flips to blue side out 4 minutes in.
When, at the beginning, he learns that a previous team has gone missing, the main character asks if they have tried "GPRS". This is the technology behind text and phone calls. Presumably he meant "GPS", the technology for locating things.
A lack of phone signal (GPRS) being the reason for a previous group getting lost discussed by the characters is an odd assertion. If GPS was meant, it requires no phone signal, just a satellite signal unencumbered by reflections or interference, and therefore would be able to give a precise location in the setting of the film. It is feasible that there would be no GPRS (2G cellular data signal) in such a remote location, but that would not affect being able to get a location.
A lack of phone signal (GPRS) being the reason for a previous group getting lost discussed by the characters is an odd assertion. If GPS was meant, it requires no phone signal, just a satellite signal unencumbered by reflections or interference, and therefore would be able to give a precise location in the setting of the film. It is feasible that there would be no GPRS (2G cellular data signal) in such a remote location, but that would not affect being able to get a location.
Very obviously camera and cameraman (wearing a mask) is visible at 11:49 mins in.
After having their shoes taken during the assault, Martin and Alma struggle on walking barefoot, despite obviously having adequate materials from camping equipment and clothing to fashion some makeshift protection for their feet to avoid injury.