Brands / Mammut / Clothing / Jackets & Coats / Mammut Aenergy

Mammut Aenergy

Name: Mammut Aenergy
Brand: Mammut
SKU: B2124541
Price: 227.40 USD
Availability: InStock

Mammut

$379.00 40% OFF

$227.40

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Product Insights & Style Tips

Mammut's Aenergy IN Hooded Jacket is the lightest, most packable insulated layer in the lineup, built for backcountry skiers, mountaineers, and winter hikers who want heat without bulk. It uses hydrophobic 850-fill DRYDown that stays lofty and insulating even when conditions get damp. The face fabric is 100% recycled nylon with a nylon lining, and the whole piece packs away into its own hand pocket for instant stash-and-go warmth on every ascent.

With a regular fit, it layers easily over a base or under a shell, moving with the body as you climb or descend. The 80-gram fill keeps you warm without looking bulky, and the down's hydrophobic properties help preserve heat in damp alpine air. When the sun drops, it compresses to a pocket-sized companion that travels from trail to town in a single breath.

Part of Mammut's Responsible Collection, it nods to a mountain heritage that meets city-smart ease. Worn with rugged denim, technical pants, or a sleek rain shell, it reads as a versatile carry-through piece for winter wardrobes.

Materials / Fabrication

Aenergy IN Hooded Jacket by Mammut, described as the lightest and most packable insulated jacket
Hydrophobic 850-fill power down insulation
Insulation: 850-fill DRYDown
Fill weight: 80 g
Face fabric: 100% recycled nylon
Lining: 100% nylon
Insert: 100% nylon
Packable design that stows in its own hand pocket
Hooded silhouette for extra warmth
Regular fit
Intended for backcountry skiing, mountaineering, and winter hiking
Responsible Collection

Recommended Care

Machine wash cold on gentle cycle with a down specific detergent to preserve loft and the hydrophobic finish
Do not use fabric softeners or detergents with additives that can coat the down
Tumble dry on low heat with dryer balls or clean shoes to restore loft; ensure the garment is completely dry before storage
Avoid direct high heat and do not iron
Store uncompressed in a cool, dry place; preferably hung or loosely folded

Fit Notes

Regular fit through the body with a hooded design for added coverage, suitable as outerwear or a warm mid-layer.
Insulation uses hydrophobic 850-fill DRYDown to maintain loft and warmth even in wet conditions.
Packable design packs down into its own hand pocket for compact storage on the move.

Styling Tips

Layer it with off-the-shoulder tops to balance the hooded silhouette of this packable insulated jacket.
Wear it with pants to keep the look practical, while it packs down into its own hand pocket for easy layering on winter hikes.
Finish with flats to keep the line lean as the hydrophobic 850-fill DRYDown insulation stays warm in wet conditions.

Style Check

Aesthetics: 9/10

Sporty yet refined, the Aenergy presents a streamlined silhouette with a compact hood and slim, boxy baffles that read as expertly engineered rather than oversized. Its lightweight sheen hints at premium insulation, while the ability to compress into a built-in pocket elevates the sense of editorial, backcountry practicality. The overall mood is modern, utilitarian chic.

Craftsmanship: 7/10

Construction appears precise, with clean edge finishing and evenly distributed loft from 80 grams of DRYDown. The hydrophobic fill suggests reliable warmth in wet conditions, while recycled face fabric signals thoughtful sourcing. Visible details are minimal but purposeful; stitching lines are straight, pockets lie flat, and the jacket maintains a poised structure when unburdened by layers.

Affordability: $$$

With its high end materials, hydrophobic down, and packability, the value feels justified. For 379, the cost aligns with its design as a versatile layer for cold weather pursuits, bridging alpine performance with urban wearability. While not entry level, its editorial lean and durability position it as a long term investment rather than disposable outerwear.

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About Mammut

Since 1862, Mammut has evolved from a Swiss rope maker into a leading global outdoor brand. Today, Mammut specializes in high-performance outdoor gear across clothing, footwear, and equipment for climbing, mountaineering, hiking, and snow sports. The line includes technical jackets, shells, insulated layers, backpacks, sleeping bags, avalanche gear, climbing ropes, harnesses, and protective footwear, all engineered for extreme conditions and everyday adventures alike. Born in Dintikon, Switzerland, the company started with rope production and later expanded to apparel and hard goods, including the iconic Eiger Extreme line. For shoppers seeking durable, technically capable pieces with alpine heritage, Mammut delivers reliability, innovation, and a long-standing mountain-first ethos.