Online Nitron 25 Rucksack Day Packs

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A streamlined, mountain-ready pack built for pace without sacrificing function.

Rab says: 

This is our definitive, streamlined pack for minimalist day hikes and moving at pace on technical trails. Built with a comfortable vest-style harness and malleable, body-hugging back system, it remains stable and enables dynamic movement on all terrain. With a lightweight, modern design and on-the-go access to pockets, it keeps you pushing onwards without holding you back.

Our Verdict

The Rab Nitron 25 stays impressively light at just under 600g, yet still feels solid and well considered. The vest-style harness provides a snug, stable fit that stays in place across technical ground, with dual chest straps adding a reassuring sense of security when picking up the pace. The vest pockets are useful—I could grab a bottle, phone, or sat comm device without breaking stride.

External pole storage is excellent, especially for a pack this size. I appreciate the deep front mesh panel, ideal for stashing waterproofs or other quick-access items. The fin-like hip pockets wrap neatly around the body and protrude into the bottle pockets, giving you far more storage than expected.

Durability feels spot on for its weight, with reinforced fabrics where they’re needed most. It’s not cluttered with unnecessary features—what’s here works, and works well.

Light, stable, and cleverly designed—this is a pack built for efficiency without compromise.

– Reviewed by Ultralight Outdoor Gear

Features

• Body hugging harness for close fit and mobility
• Moulded back panel for comfortable and flexible fit
• Panel loader with zipped entry
• Top tensioners ensure great fit for maximum carrying comfort
• Flask stash harness pocket for quick grab water breaks
• Double chest strap for added security especially at high pace
• Secure zipped harness pocket for easy access on the move
• Front stash pocket
• On the go z-pole attachment
• Additional standard walking pole carry
• Hydration compatible-fits 3L bladder

Specifications

• Small weighs: 558g
• Medium weighs: 596g

Material & Construction

• 100D ROBIC® Nylon Ripstop with Hydrosheild Coating
• 70D X 140D Nylon with TriShield Coating
• Main: 100% Nylon, Lining: 100% Polyester

Help & advice:

• The Ultimate Guide to Choosing an Ultralight Rucksack
• Time-Saver Guide to Choosing a Rucksack
• About Rab
• Rab Backpack Size Guide
• Rab Sustainability and Responsibility