Mammut Aenergy 12 Backpack Archived28Nov25 This slim-fit

This slim-fit

Slim silhouette fits close to the body without being restrictive

We do not offer any customization beyond text

These 2-way stretch gives you optimal freedom of movement

Reversible design

Mammut Aenergy 12 Backpack Archived28Nov25 This slim-fitUltra light 12L hiking backpack From our lightest and most pace driven line of hiking backpacks. Made for fast hikes and everyday adventures when feeling weightless is the name of the game, this featherweight champion combines breathable, ergonomic shoulder straps with just enough back padding for the ultimate in bulk free comfort. No skimp for storage nonetheless, the hydration system compatible main compartment is complemented by a large mesh outer