How much of the pack does the 'travel shell' cover exactly? I plan on using this as a carry on, but in the event I would have to check the pack, I don't want to have to worry about the straps getting caught on a conveyor belt or the like -- will it fully cover the straps and prevent them from getting snagged?

Tech Specs:

Material:

[Main] 420D HT Helix Ripstop Nylon, 210D HT Helix Double Box; [Bottom] 500D Cordura; [Liner] 70D Parachute Ripstop Nylon 

Volume:

[Total] 4200cu in; [Daypack] 1200cu in 

Back Panel:

Air Mesh Foam 

Hydration Compatible:

Yes 

Torso Adjustment:

Yes (17-20in) 

Detachable Pack:

Yes 

Sleeping Bag Compartment:

No 

Rain Cover:

Yes 

Access Types:

Front, top, bottom 

Gear Loops:

Yes 

External Pockets:

2 side, 1 front 

Snowboard Carry:

No 

Ski Carry:

No 

Recommended Use:

Travel, vacations, backpacking 

Weight:

4lbs 2oz 

Warranty:

Lifetime