Enough room for everything.
Special barrel and marker place.
I think none!It's a great product!
Guys this is a great backpack you can put everything in it!
Read what i have in it:
1xeVLution II hopper(egg)
2xBarrels(it can take up to 5)
1xAluminium 3000psi tank
all the manuals of my stuff
all the tools that I need for my equipment+oil+o-rings+cleaning things
My wallet,my keys,my mobiles,my pda,my digi camera,2 t-shirts,a towel and some other stuff and it has room for more things
I had a headshield mask and it doesn't fit in there but all other masks can be put in.
Guys i recommend u this back pack it is great and it worth it's money!You will have your stuff tidy and all in it!