It is 4:30 am in the morning. Your friend is waiting in front of your house and you overslept.
5 minute mission:
-pack headlamp, spare clothes, energy bar, sunscreen and sunglasses,
-brush your teeth.
Well known story of every sunrise seeker.
So here it is. One and only The DOPERS Hard Case which allows you to pack your sunglasses in a matter of seconds, without worrying of cracking them somewhere in the bottom of your backpack.
Oh... And yes. The zipper is so damn smooth.