Mammut Aenergy ST

The vest-inspired system sits higher and closer to your body than a standard pack, which significantly reduces bouncing during technical ascents or descents. It feels more like a piece of apparel than a piece of luggage, offering superior stability when you are moving quickly.

Yes, the pack features a dedicated front pocket specifically designed for avalanche safety gear like your shovel and probe. This ensures you have immediate access to critical equipment when every second counts.

For most fast-and-light ski tours, 20-25 liters is the sweet spot. It provides enough room for your safety gear, extra layers, skins, and hydration, though you will need to pack efficiently if you are carrying bulky specialized equipment.

Not at all. While the rolltop provides weather protection and adjustable volume, the pack also includes a back zipper that allows you to open the main compartment fully. This gives you easy access to items at the bottom without having to dump everything out.

Yes, it comes with an integrated helmet carrier. This allows you to secure your helmet to the exterior of the pack during the ascent, keeping it out of your way while leaving the main compartment free for other gear.

The Aenergy ST 20-25 is bluesign® PRODUCT certified, meaning it meets strict environmental and safety standards throughout the supply chain. It is also PFC-free and constructed with recycled materials, reflecting Mammut's commitment to reducing environmental impact.