We find this suitable for
What is the OMM Mountain Raid 303 Sleeping Bag?
The OMM Mountain Raid 303 Sleeping Bag is for those who feel the chill or want to camp deeper into the colder months. The Mountain Raid 303 is the warmest in their lineup—ideal for frosty mountain adventures, cold bivvy nights, or damp-weather expeditions.
What is it made of?
Outer Shell Material: PointZero Nylon with DWR Finish
The sleeping bag's outer shell is constructed from PointZero nylon, a fabric known for its exceptional lightweight properties and durability. This advanced nylon material balances strength and packability, making it ideal for ultralight outdoor gear. The fabric is treated with a Durable Water Repellent (DWR) coating to enhance its performance in wet environments. This treatment allows the fabric to effectively shed light moisture, such as dew or condensation, helping to keep the interior dry even in damp conditions. DWR finish acts as a critical first barrier against humidity, prolonging comfort and reducing the chances of the insulation becoming saturated.
Insulation: PrimaLoft Cross-Core Gold Eco
The Mountain Raid 303 is insulated with PrimaLoft Cross-Core Gold Eco—an advanced synthetic fill that blends cutting-edge aerogel technology with recycled fibres to achieve exceptional warmth-to-weight performance. Designed to mimic the loft and softness of down, it continues to insulate effectively even in damp conditions, making it a reliable choice for unpredictable mountain environments.
Recycled content
Made from 90% recycled content, PrimaLoft Cross-Core Gold Eco helps reduce waste and reliance on virgin materials without compromising quality or warmth. Repurposing post-consumer fibres supports a more sustainable manufacturing process and lowers the sleeping bag's overall environmental impact.
What are its features?
The Mountain Raid 303 is designed with ultralight efficiency in mind. It has a half-length YKK zip that reduces weight and potential cold spots, helping maintain core warmth without compromising functionality. It still provides easy entry and exit access, striking a great balance between performance and practicality.
Mummy Shape with Heat-Locking Features
To retain warmth in cooler conditions, the bag adopts a close-fitting mummy shape that contours to your body. This snug silhouette minimises dead air space inside the bag, allowing body heat to circulate better. An adjustable drawcord hood adds another level of thermal protection, sealing in heat around your head, one of the most vulnerable areas to nighttime cold.
Insulation Mapping
The Mountain Raid 303 features insulation mapping. The upper section of the bag, where exposure to cold air is greatest, uses a thicker 170g/m² layer of PrimaLoft Cross-Core Gold Eco insulation to trap maximum heat. In contrast, the base features a lighter 133g/m² fill, reducing unnecessary bulk and allowing your sleeping mat to provide insulation from below. This strategic distribution not only enhances thermal efficiency but also helps minimise overall weight, making the bag a better choice for those looking to go fast and light without sacrificing warmth.
Ergonomic Footbox for Natural Sleep
The shaped footbox lets your feet rest in a relaxed, natural position, improving overall sleep quality. Rather than compressing your toes or forcing them into awkward angles, the tailored design offers enough space for gentle movement and comfort.
Packs Small, Travels Light
Despite its insulating power, the Mountain Raid 303 compresses down to 30 x 15cm, making it incredibly packable for lightweight missions. Whether you're bikepacking, fastpacking, or on a minimalist alpine bivvy, this compact pack size means you can carry high performance without overloading your gear setup.
Hang Loops for Drying and Storage
At the sleeping bag's base, integrated hang loops offer a simple yet convenient feature for field use and long-term care. After a damp night or multi-day expedition, these loops make it easy to air out or dry the bag quickly, essential for maintaining insulation performance and preventing moisture build-up. They also provide a convenient solution for storing the bag uncompressed at home, helping preserve the loft and extend the lifespan of the insulation.
Features:
- Thicker insulation on top than on the base
- Half-length YKK zip
- Durable Water Repellent (DWR) treatment
- 90% post-consumer recycled content
- Mummy shape with drawcord hood
- Shaped footbox
- Fast drying and easy care
- Hang loops at the base