Weathershedding
The Tek O2 2.5L Element Jacket does not have a helmet compatible hood. Without a helmet the hood fits snug, adjusts easily and follows head movement. The jacket deflected plenty of rain without issues thanks to fabric flaps protecting the front and hand pocket zips. The chest pocket uses a waterproof zipper. 

Breathability
LL Bean calls the Tek O2 2.5L Element Jacket their most breathable waterproof shell. It does a good job, especially for the price. Pit zips help kick up the cooling to higher level. 

Function
Despite a feature set and look that would look cutting edge 15 years ago—big ugly Velcro tabs on the wrist, front flap over main zip—the jacket fit really nicely and comes well equipped. The chest pocket is a nice touch that most other jackets here don’t have. An internal sleeve pocket is handy, especially for storing a music player. And the fit is well proportioned and doesn’t hike up when reaching.

Durability
The Tek O2 2.5L Element Jacket is the toughest feeling of the jackets in this category, it’s also backed by LL Bean’s excellent return policy. The ripstop fabric is lightweight but solid. 

Packability
Even as the heaviest shell in the category the Tek O2 2.5L Element Jacket still packs pretty small albeit a larger than the others. It only weighs 13 ounces, which is not a lot more than any other here, but it comes with the most features like pit zips and three pockets.