smith bike helmet forefront large 3 MIPS There is a total of 20 optimized vents Smith's Forefront 3 is about

Just wow fits my shoulders perfectly with a lot of extra room if I decide to go on a McDonald's and deep fried Twinkie 5 Josh T

There is one with Swarovsky crystals

There is also a luggage passthrough strap so you can attach the backpack to your luggage its a nice feature that not many other backpacks have

Premium Venting Reduces Heat at The Top of The Head

This versatile outdoor use pack loads from the top has multiple exterior pockets, and includes mesh for increased back airflow

(Its the outside spool diameter on fully loaded reels that determines line pick-up rate - not the arbor size.) So it is worth the money