A must-have for winter camping lovers! The insulation expansion set that enhances the warmth of the "-30°C sleeping bag" has been released!

In severe winter camping, securing quality sleep is the biggest challenge. So what to do—let's enhance the performance of sleeping bags designed to cope with extreme conditions of minus 30°C with the "Insulation Extension Set" to create a warm environment.

The overwhelming heat retention and sense of security created by layering

An item that is likely to become an essential for campers who love camping, especially in winter, has appeared. Let's take a look at the structure of the "Bears Rock Insulation Expansion Set," which further enhances the insulation of a -30℃ sleeping bag.

The core of this set is the idea of "layering," which allows you to adjust the warmth according to the situation. By combining the base " -30℃ compatible envelope sleeping bag" with a dedicated inner sleeping bag, it becomes possible to dramatically raise the perceived temperature. In winter fields where the cold may exceed expectations, instead of relying on a single piece of bedding, layering items can thoroughly prevent cold air intrusion, maintaining warmth throughout the night without interruption.

A wide design sleeping bag that achieves the comfort of a futon

The base sleeping bag features the openness unique to envelope types and a fluffy texture like a futon. It is designed wide, with a width of about 90 centimeters, eliminating the cramped feeling often experienced with standard mummy-shaped sleeping bags. You can easily turn over inside even while wearing thick winter clothing, and there is plenty of space at the foot. It utilizes a unique "BR Warm" material that retains a lot of air in the filling, achieving a reassuring sleeping experience that feels like being wrapped up.

The role of the boa fleece inner that prevents heat from escaping from the neckline

included in the set, "Kurumin Boa Fleece Long," plays an important role in enhancing the airtightness inside the sleeping bag. The soft boa fleece material gently wraps around from the upper body to the head, effectively guarding the gaps at the neck and shoulders where heat is believed to escape most easily during winter camping. The inner can also be used as a blanket on its own, and when it gets dirty, you can wash just the inner, providing a practical advantage for keeping the overall bedding clean.

Product name / Insulation expansion set (-30°C envelope-type sleeping bag + Kurumin Boa Fleece Long)
Price / 20,250 yen

Sleeping bag / -30°C envelope-type sleeping bag
Unfolded size / (approx.) 230cm x 90cm
Stored size / (approx.) 45cm x 36cm
Surface fabric / 300T Polyester
Inner fabric / Moisture-absorbing fluffy polyester
Filling / BR Warm 3D hollow fiber
Season / 4 seasons
Applicable temperature / 20°C to -10°C to -30°C
Comfortable sleep temperature range / 20°C to -10°C
Usable temperature range / -10°C to -30°C

Inner / Kurumin Boa Fleece Long
Material / Boa fleece
When in use / (approx.) 240cm x 75cm
Stored size / (approx.) 40cm x 20cm
Weight / (approx.) 1250g

●Bears Rock

Search Bears Rock Insulation Extension Set on Amazon