ALTUS Lhotse 90L Trekking Backpack User Manual

Product Overview

The ALTUS Lhotse 90L is a high-capacity and comfortable alpine trekking backpack designed for multi-day excursions. It features a robust yet lightweight construction with a breathable mesh back for maximum comfort during long routes. The backpack is compact and highly resistant, making it an ideal companion for hiking and camping trips.

Key features include large capacity zippered side pockets, an elastic mesh front pocket, reinforced side supports for skis, and front straps with a reinforced piece for carrying two ice axes or trekking poles. The interior can be divided into two compartments for organized packing.

Front view of the ALTUS Lhotse 90L Trekking Backpack, showcasing its large capacity and external attachment points.

Rear view of the backpack, highlighting the breathable mesh back panel and the ASIHOS height adjustment system.

Setup and Initial Adjustment

ASIHOS System Adjustment

The ASIHOS SYSTEM allows for height adjustment of the backpack to fit various torso lengths. This system utilizes straps to modify the back panel's dimension, ensuring a personalized and comfortable fit. The ASIHOS system is built on a lightweight, ergonomic aluminum frame integrated into the back panel, which helps maintain the backpack's vertical stability and provides ample internal space.

1. Loosen All Straps: Before putting on the backpack, loosen all adjustment straps, including shoulder straps, load lifters, sternum strap, and hip belt.
2. Adjust Torso Length: Locate the ASIHOS adjustment mechanism on the back panel. Follow the markings or instructions on the system to slide the shoulder harness up or down until it matches your torso length. The top of the shoulder straps should be approximately 2-3 inches below your shoulders when the hip belt is properly positioned.
3. Position Hip Belt: Fasten the hip belt around your hips so that the top edge of the belt rests on your iliac crest (hip bones). Tighten the hip belt securely. Approximately 70-80% of the pack's weight should be carried on your hips.
4. Tighten Shoulder Straps: Pull the shoulder straps down and back to snug the pack against your back. Avoid overtightening, as this will shift weight off your hips.
5. Adjust Load Lifters: These straps connect the top of the shoulder straps to the top of the pack. Tighten them to pull the top of the pack closer to your body, preventing it from swaying backward. They should be at a 45-degree angle.
6. Fasten Sternum Strap: Adjust the sternum strap across your chest to a comfortable height. This strap helps stabilize the shoulder straps and prevents them from digging into your armpits.

Operating Your Backpack

Packing Guidelines

• Heavy Items: Place heavier items close to your back and centered in the main compartment for optimal balance and comfort.
• Medium Weight Items: Distribute medium-weight items around the heavy items.
• Lightweight Items: Pack lighter, bulkier items at the bottom and top of the pack.
• Frequently Accessed Items: Keep items you'll need often (e.g., rain gear, snacks) in easily accessible pockets like the front elastic mesh pocket or side pockets.
• Internal Division: Utilize the internal division feature to separate your gear into two compartments, which can be useful for separating clean/dirty clothes or sleeping gear from other items.

Accessing Compartments

• Main Compartment: Accessed from the top opening. The internal divider can be opened or closed as needed.
• Side Pockets: Large capacity pockets with zipper closures, ideal for water bottles, small tents, or other quick-access items.
• Front Elastic Mesh Pocket: Perfect for stashing a jacket, map, or other items you need to grab quickly without opening the main compartment.

Attaching External Gear

• Ski Supports: The reinforced side supports are designed to securely carry skis. Ensure skis are balanced and tightly secured to prevent shifting during movement.
• Ice Axe/Trekking Pole Loops: Use the front straps and reinforced piece to attach two ice axes or trekking poles. Secure them firmly to prevent them from swinging or falling.

Care and Maintenance

Cleaning

• Hand Wash Only: The backpack should be hand washed. Do not machine wash, tumble dry, iron, or dry clean.
• Spot Cleaning: For minor dirt, use a damp cloth with mild soap and water to spot clean affected areas.
• Thorough Cleaning: For a more thorough clean, submerge the backpack in a tub of cool water with a small amount of mild, non-detergent soap. Gently scrub with a soft brush or cloth.
• Rinsing: Rinse thoroughly with clean water until all soap residue is removed.
• Drying: Hang the backpack upside down in a well-ventilated area, out of direct sunlight, to air dry completely. Ensure it is fully dry before storing to prevent mildew.

Storage

• Store your backpack in a cool, dry place away from direct sunlight and extreme temperatures.
• Ensure the backpack is completely dry before storage to prevent mold and mildew growth.
• Avoid storing heavy items on top of the backpack, which could deform its shape.

Troubleshooting

• Discomfort or Uneven Weight Distribution:
  Solution: Re-adjust the ASIHOS system for proper torso length. Ensure the hip belt is carrying most of the weight and that the shoulder straps are snug but not tight. Re-pack the backpack, placing heavier items closer to your back and centered.
• Backpack Swaying:
  Solution: Tighten load lifter straps to pull the top of the pack closer to your body. Ensure all compression straps are tightened to stabilize the load.
• Zippers Sticking:
  Solution: Clean the zipper teeth with a small brush to remove dirt or debris. Apply a zipper lubricant (e.g., silicone spray or wax) if necessary.
• Material Wear and Tear:
  Solution: While the material is resistant, sharp objects or abrasive surfaces can cause damage. Avoid dragging the backpack on rough terrain. For minor tears, repair kits are available.

Technical Specifications

Warranty and Support

For specific warranty details regarding your ALTUS Lhotse 90L Trekking Backpack, please refer to the official ALTUS website or the retailer from whom you purchased the product. Warranty terms and conditions may vary by region and point of purchase.

For customer support, technical assistance, or inquiries about spare parts, please contact ALTUS customer service through their official channels. You can typically find contact information on the ALTUS brand website.