the OMM Mountain Raid 303

the OMM Mountain Raid 303

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The OMM Mountain Raid 303 is OMM's warmest sleeping bag yet , designed for cold nights, longer seasons and adventures in tough mountain conditions . OMM themselves say that they previously thought the Mountain Raid 233 was their warmest model – but with the 303, "they really mean it". With three times the insulation of the lightest models , this is the sleeping bag for those who sleep cold or want to extend their camping and hiking season significantly .

The sleeping bag is filled with PrimaLoft® Cross-Core Gold Eco , OMM's most advanced synthetic insulation. The insulation is strategically zoned for maximum thermal efficiency:

170 g/m² on the top side – where heat loss is greatest

133 g/m² on the underside – where insulation would otherwise be compressed

The total insulation amount of 303 g/m² gives the model its name and makes it possible to achieve very high warmth without unnecessary pack weight , since insulation under the body cannot loft effectively anyway.

The shell is OMM's PointZero® nylon , a very lightweight and durable material with a DWR treatment that repels moisture and wind. Combined with the synthetic insulation, this makes the Mountain Raid 303 a reliable choice in wet and changing conditions , where down-based alternatives often lose performance.

To maximize warmth and keep weight down, the sleeping bag features a half-length YKK zipper , a snug mummy fit , adjustable hood , and a molded foot box . The tapered construction reduces dead air and helps your body quickly warm up the bag, even on really cold nights.

Despite its extreme warmth level, the Mountain Raid 303 only weighs around 790 grams , making it one of the warmest synthetic sleeping bags in relation to its weight on the market – perfect for mountain adventures where both safety and packability are crucial.

Features & Benefits

OMM's warmest sleeping bag ever – maximum warmth in synthetic design

PrimaLoft® Cross‑Core Gold Eco – insulates even when wet

Zoned insulation (170/133 g/m²) – warmth where it's most useful

Warm but light (~790 g) – high comfort without unnecessary weight

PointZero® shell with DWR – protection against moisture and wind

Perfect for cold sleepers and long season

Features

PrimaLoft® Cross-Core Gold Eco insulation (90% recycled content)

Half-length YKK® zipper

Mummy-shaped fit

Adjustable hood with drawstring

Shaped and insulated foot box

Quick-drying and easy-care material

Suspension loops at the foot end

Technical specifications

Weight : approx. 790 g

Insulation : PrimaLoft® Cross‑Core Gold Eco

Insulation distribution : 170 g/m² top, 133 g/m² bottom

TOG value : 7.9 dry / 6.0 wet

Length : approx. 195 cm

Shoulder width : approx. 65 cm

Foot width : approx. 35 cm

Package size : approx. 30 × 15 cm

Material : PointZero® nylon with DWR

Suitable for

Cold mountain nights, winter and autumn tours, Mountain Marathons and adventurers who freeze easily and want maximum warmth in a lightweight, robust synthetic sleeping bag system .

Care instructions

Wash according to manufacturer's instructions. Air dry completely and store uncompressed for best longevity and insulation performance.