**Product Specifications:**
**Brand:** Pelliot
**Series:** Classic Series
**Model:** S.A770
**Capacity:** 40L/60L
**Intended Use:** Professional mountaineering and urban travel
**Material:** 840D tear-resistant and abrasion-resistant fabric
**Features:**
- Large capacity with multiple compartments and pockets
- Breathable back panel
- Expandable top compartment
- Shoulder strap storage pocket
- Wind rope system
- Front kangaroo pocket
- Comfortable shoulder straps
- Side attachment points for trekking poles
- Water-resistant fabric with moisture-proof bottom
- Waist storage pocket with integrated rain cover
**Design:**
- Aluminum alloy arch bridge design
- Scientific carrying system with S-shaped shoulder straps
- High elasticity back cushion
- Pressure-relieving design with widened shoulder straps, back frame, waist belt, and chest strap
- Honeycomb mesh back panel for ventilation
**Additional Features:**
- YKK quality zippers
- Adjustable chest strap
- Side zippered pockets for small items
- Bottom hidden rain cover
- Side pockets for water bottles
**Usage Scenarios:** Suitable for travel, hiking, camping, and mountaineering
**Color Options:** Deep Sea Blue (40L/60L)
**Details:**
- Expandable top compartment for extra storage
- Thickened shoulder straps for comfort
- Quality buckles for stability
- Side pockets for phone storage
- Hidden rain cover at the bottom
**Accessories:**
- Aluminum alloy frame for support
- Breathable mesh back panel
- Adjustable chest strap
**Compatibility:** Suitable for trekking poles and moisture-proof mats
**Care Instructions:** Hand wash with mild detergent, air dry
**Note:** The above specifications are based on the Pelliot Classic Series 40L/60L mountaineering backpack model S.A770.
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