Mammut Aenergy ST 20-25 - Mammut Red / One Size is backordered and will ship as soon as it is back in stock.
EXPRESS SHIPPING
EXPRESS SHIPPING
Orders are processed within 1 business day of purchase confirmation.
For shipments within Italy:
- Express 24/48h shipping, with estimated delivery in 1–2 business days, for €8.50;
- Express shipping is free on orders of €100 or more;
- all shipments are tracked and insured.
For international shipments, tracked and insured Express delivery takes approximately 2–3 business days to the main European countries and 3–5 business days to the others. Costs depend on the order weight and the destination country and can be found on the dedicated page or at checkout.
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CUSTOMER SUPPORT
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Mammut Aenergy ST 20-25 - Mammut Red / One Size is backordered and will ship as soon as it is back in stock.
DESCRIPTION
The Mammut Aenergy ST 20-25 is a ski touring backpack with an adjustable volume between 20 and 25 liters, designed for those who seek lightness without compromising stability and functionality in snowy environments. Its architecture is directly inspired by trail running vest designs: the ergonomic suspension system keeps the load close to the back and distributes weight precisely, eliminating sway even on steep, snowy terrain.
Carry System and Access
The lateral compression straps allow you to reduce the volume when the load is limited, improving stability during technical ascent phases. The attachment system for A-frame and diagonal ski carry allows for transporting gear during sections on foot without obstructing movement. The snow tool pocket (ice axe, poles) is quickly accessible without needing to open the main compartment.
Materials and Technical Details
- Construction in lightweight, high abrasion-resistant fabric, optimized for contact with snow and ice
- Ventilated and contoured back panel to promote breathability during demanding ascents
- Compatibility with an integrated hydration bladder in the rear compartment
- Front pocket for quick access to accessories (goggles, gloves, snacks)
- External helmet attachment
Ideal for single-day ski touring trips on demanding alpine routes, where every gram counts and gear management must be immediate, even with gloves on.





