Iceflame 4 Season Down Sleeping Bag (0°C, -5°C & -12°C) - Flame NXT Series

Built for cold, weight-conscious nights

The Iceflame NXT Series is a down sleeping bag range for hikers, bikepackers and mountain travellers who want dependable warmth without carrying unnecessary bulk. Choose the temperature rating that matches your expected conditions, then tailor the fit and down choice to your trip.

Each NXT bag uses lofty Muscovy duck down and lightweight 10D nylon fabrics to balance insulation, packability and everyday trail comfort. The water-repellent outer fabric is designed to help shed light moisture, while the soft, breathable lining helps keep the sleep system comfortable through the night.

Choose your NXT bag

• Temperature rating: SD400 NXT (0°C), SD700 NXT (-5°C) or SD1000 NXT (-12°C). Select the warmth level best suited to your planned conditions and personal sleep comfort.
• Size: S, M or L, so you can choose the fit that works best for you.
• Down type: 850FP Muscovy or 900FP Muscovy. The 900FP option offers more warmth for its weight.

Why choose the NXT Series?

• Lightweight insulating performance: high-loft Muscovy duck down helps deliver serious warmth in a pack-friendly sleeping bag.
• Purposeful model range: three temperature options let you match your bag to summer alpine trips, colder shoulder seasons or winter conditions.
• Technical fabric choice: lightweight 10D nylon fabrics keep weight down, with a water-repellent outer treatment for added reassurance in damp camp conditions.
• Built for efficient warmth: the NXT models use baffle construction chosen to support down loft while managing weight.
• Easy to pack: a compression bag is included to help keep the sleeping bag compact in your pack.

Important: Temperature needs vary with the sleeper, clothing, sleep mat and conditions. Choose a rating with an appropriate margin for your expected overnight temperatures.

Need a warmer custom setup? Extra down can be added at £30 per 100 g; please contact us to discuss your requirements.