Iceflame 3 Season Down Sleeping Bag (0°C & 3°C) - Core Series

Built for lightweight three-season nights, the Iceflame Core Series brings together two down sleeping-bag designs for campers and backpackers who want to choose the balance of warmth, weight and fabric durability that suits their trips.

Core NXT (0°C) is the more robust option, using full 3D box-wall baffles to help the down loft and a 10D ripstop nylon shell with a durable water-repellent finish. Corelite (3°C) takes the same fully baffled 3D-box approach in an exceptionally light, highly breathable 7D nylon construction for milder conditions and weight-conscious packing.

Available Choices

• Model: choose Core NXT with either right- or left-hand zip, or Corelite with a right-hand zip. The model choice sets the stated temperature rating and construction.
• Size: select R or L for the fit and internal length that best suits you.
• Down Type: choose from the down-fill options shown for your selected variant; the 900FP option is labelled Extra Warmth in the selector.

Key Features

• Full 3D box-baffle construction: supports the down's loft for insulated, comfortable sleep.
• Down-filled warmth: Core NXT uses RDS-certified 850FP or 900FP Muscovy duck down; Corelite uses RDS-certified 850FP+ Muscovy duck down in its standard construction.
• Purposeful fabric choices: a 10D ripstop, DWR-treated shell on Core NXT prioritises durability, while Corelite's 7D nylon keeps weight exceptionally low and breathability high.
• Packable by design: Core NXT includes a compression bag for reducing packed volume.

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.