Ull Backpack 20L – Compact Ski Touring & Alpine Hiking Pack Meet the Klättermusen Ull Backpack 20L — a compact, lightweight ski touring backpack built for half-day missions, fast summit pushes and active mountain days where efficiency matters more than excess volume. With its streamlined 20L format, ergonomic carry and technical attachment system, it gives you the freedom to move fast in snow, rock and mixed terrain without the bulk of a larger alpine pack. Primarily designed for ski touring, the Ull Backpack 20L also works beautifully as a technical hiking backpack for fast day hikes, alpine trekking and light climbing approaches. Ventilated, stable and close-fitting, it combines dynamic mobility, quick-access storage and mountain-ready features in a clean, minimalist silhouette built for movement all year round. Who is it for? For ski tourers, fast hikers, climbers and minimalist mountain users looking for a compact alpine daypack that stays close to the body and never feels overbuilt. If you want a 20L mountain backpack that can carry avalanche tools, hydration, layers and essential alpine gear without slowing you down, the Ull Backpack 20L is a seriously capable option. What Makes It Stand Out Built for fast ski touring and alpine movement: The Ull Backpack 20L is engineered for half- or full-day tours, with a lightweight, movement-friendly design that also performs brilliantly on alpine hikes and technical trekking routes. Ultra-light and comfortable all day: At just 718 g, it keeps the load light on your back while still offering the stability and mountain-ready features needed for demanding terrain. Ventilated, ergonomic carry system: The well-ventilated back construction and S-shaped shoulder straps promote airflow, comfort and natural freedom of movement when the pace picks up. Technical attachment points where they matter: External loop webbing and dedicated holders make it easy to carry trekking poles, skis or an ice axe without cluttering the pack. Compact, compressible 20L format: Compression straps help stabilize smaller loads and keep the pack efficient, close-fitting and agile across changing conditions. The top-loaded drawcord design is quick to handle with one hand, even with gloves or on steep terrain. Inside, an organization pocket separates your essentials, while the safety pocket keeps avalanche tools easier to manage. It’s a compact technical daypack that feels clean, smart and purpose-built from the first climb to the final descent. Why You’re Going to Love It Some mountain packs are simply more than you need. The Klättermusen Ull Backpack 20L goes the other way: light, efficient, highly wearable and stripped back in the best possible sense. It gives you real alpine functionality without extra structure, unnecessary bulk or wasted space. Moves naturally with your body thanks to the S-shaped shoulder straps and dynamic sternum system that improve comfort on the climb. Keeps the load secure and balanced with 4-point sternum attachment, top tension locks and a hip belt safety closure for better weight distribution. Lets you grab essentials quickly through the side zip access, so you don’t need to fully unpack on the mountain. Can be made even lighter with its removable back plate — a smart detail for fast missions and minimalist setups. Works across seasons and activities, from ski touring to hiking, climbing and minimalist trekking. Need something roomier for longer tours or bigger loads? Explore the Ull Backpack 30L, the larger version designed for more gear-intensive alpine days. If you’re after a light ski touring backpack that can also serve as a compact hiking pack throughout the rest of the year, the Ull Backpack 20L is one of those rare designs that feels both technical and easy to live with. Technical Specs – Ull Backpack 20L Brand: Klättermusen Product type: Lightweight ski touring backpack / compact alpine hiking pack Product name: Ull Backpack 20L Fit: Regular fit – body back length 47–52 cm Dimensions: 58 x 16 x 28 cm Volume: 20L Weight: 718 g Recommended max. load: 8 kg Opening system: Top-loaded drawcord opening with cinch closure Access: Side zip access for easier reach on the move Back system: Ventilated ergonomic back panel Shoulder straps: S-shaped shoulder straps for improved mobility Sternum system: 4-S System® sternum closure with 4-point attachment for free movement and stability Compression: Adjustable compression straps Hip belt: Hip belt with safety closure for optimal weight distribution Attachments: Equipment holder for poles and ice axe, cord loop webbing, ski-compatible external carry options Interior organisation: Internal organisation pocket and internal safety pocket for avalanche tools Hydration compatible: Yes Removable back plate: Yes Main fabric: Retina® – 100% recycled polyamide, 210D, 160 g/m² Reinforcements: WindStretch® and Duracoat™ in high-wear areas Water resistance: Water-resistant construction with protective coated fabrics and reinforced high-wear zones Sustainability: 100% recycled polyamide main fabric, PFAS-free Best for: Ski touring, hiking, climbing, alpine trekking FAQ + Is the Ull Backpack 20L good for ski touring? Yes. The Ull Backpack 20L was specifically engineered for half- or full-day ski tours. It includes attachment options for skis, poles and an ice axe, plus an internal safety pocket for avalanche gear, making it a strong fit for technical winter missions. + Is 20L enough for a full-day mountain mission? For many fast and efficient mountain days, yes. A 20L format is often enough for layers, hydration, food, gloves, avalanche essentials and a few technical accessories. If you usually carry bulkier equipment or want more room for longer tours, the Ull Backpack 30L may be the better option. + Can the Ull Backpack 20L also be used for hiking and trekking? Absolutely. While it is primarily designed as a lightweight ski touring backpack, its low weight, ergonomic carry system, hydration compatibility and compressible shape also make it a great technical hiking backpack for fast day hikes, alpine trekking and climbing approaches. + How light is the Klättermusen Ull Backpack 20L? The pack weighs just 718 g, which makes it an excellent choice for users looking for a lightweight alpine pack that stays comfortable during long ascents and active mountain days. + Is the Ull Backpack 20L waterproof? The Ull Backpack 20L is highly water-resistant rather than fully waterproof. Its coated technical fabrics and reinforced high-wear areas help protect your gear against snow, moisture and changing mountain conditions. + What is the 4-S System® on the Ull Backpack 20L? The 4-S System® is Klättermusen’s dynamic sternum closure system. It uses a 4-point attachment design to distribute tension more naturally across the upper body, improving stability while allowing freer shoulder movement during skiing, climbing or hiking. + What is the difference between the Ull Backpack 20L and the Ull Backpack 30L? The Ull Backpack 20L is the more compact, faster-moving option for lighter mountain missions. The Ull Backpack 30L adds volume for longer tours, extra layers and more gear-intensive alpine days. + What material is the Ull Backpack 20L made from? The main body is built from Retina®, Klättermusen’s lightweight and durable fabric made from 100% recycled polyamide. High-wear areas are reinforced with WindStretch® and Duracoat™ for added abrasion resistance in demanding alpine use.
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