WindproofAdditional protection from the wind (fabric without windproof membrane).
Abrasion resistanceFabric with tight-weave so you can wear a backpack without risk of tearing.
Freedom of movementBi-stretch fabric, sleeves with thumb loops.
LightweightCompressible and light (417 gr in L). Ideal in the bottom of the backpack!
BreathabilityUsing a thinner fabric on the sides and inside the arms