This is interesting - my experience is that outdoor gear is one of Amazon's absolute weakest markets. I can't remember the last time they beat out my alternatives for backpacks, tents, etc.

There seem to be a bunch of factors in that. One is that buying offbrand is rarely a good idea (since you end up stress-testing everything), so people go for less-famous branded stuff instead. Two is that close equivalents aren't - I can buy any charger with the right voltage and plugs, but not any equal-size backpack. Three is that outdoor gear already has a lot of tiny-margin sellers; between REI, Campmor, MooseJaw, and ActiveJunky rebates there's very little room to undercut.