ICEFLAME — ThermoFlex Module Sleeping Bag

1. Quick Introduction

ICEFLAME’s ThermoFlex Module sleeping bag is a new sleep solution built for modern outdoor adventurers. Designed around a modular system that blends high insulation with multi-purpose usability, the ThermoFlex delivers comfort and performance from –20°C to +20°C.

👉 https://outdoorul.com/product/product-ix-a-modular-sleeping-system/

2. Background / Release Story

The modular sleeping bag concept dates back to 2017. A very small batch was attempted in 2018, but due to manufacturing limitations, only 30 units were produced. For years, the community kept requesting a relaunch.
With the new NXT product line rolling out this year, the modular sleeping bag finally goes into official full-scale production.

3. Product Overview

The ThermoFlex Module is built using premium down and sustainable materials, offering up to 1000 g of fill while keeping the total weight under 1500 g. The upper module provides high warmth retention, while the lower module is designed for adaptability across seasons.

Temperature versatility:

• From –20°C (fully combined modules)
• To +20°C (blanket-only warm-weather configuration)

4. Modular Design

• Upper module: High-insulation quilt that can also be opened flat and used as a blanket.
• Lower module: Adjustable tensioning, hood included, designed for stability and warmth control.
• Using both together gives a setup similar to a home duvet + mattress topper — but optimized for outdoor thermal efficiency.

This flexible configuration makes the ThermoFlex usable across all seasons.

5. Comfort & Build

• Soft, down-duvet feel: Filled with high-loft Muscovy duck down, with a grey outer shell and yellow lining for a warm, home-like touch.
• 3D structure (outer-bigger, inner-smaller): This technical build creates larger loft cavities for better insulation and reduces cold spots, even when you shift in your sleep.
• Footbox option: The quilt includes a leg zipper that can be closed to create a sealed footbox for extra warmth.

6. All-Season Temperature Control

Thanks to the ThermoFlex modular system:

• Blanket only → for warm conditions
• Lower + upper module together → for spring/fall
• Fully sealed configuration → handles down to –20°C

Ensures comfort across a wide range of climates.

7. Weight & Packability

• Weight: under 1500 g
• Packed size: approx 28 × 25 cm, about 10 L in compression volume
  Lightweight and portable for mountaineering, thru-hiking, trekking, camping, and car camping.

8. Fabrics & Breathability

• 10D nylon shell: water-resistant, extremely breathable, tear-resistant.
• Moisture control: Natural oils in mature Muscovy down + breathable shell prevent inner condensation, keeping the sleeping bag drier during multi-day use.
• PFAS-free: No fluorinated chemicals or harmful coatings.

9. Down Quality & Ethics

• Fill power options: 800 FP or 850 FP Muscovy duck down
• RDS certified: Ensures ethical down sourcing
• IDFL tested: Verifies cleanliness, fill power, and quality
• Source: Down from Muscovy ducks raised over 100+ days for superior maturity and loft
• Ethical standards: Animal welfare and sustainability prioritized

10. Structural Highlights

• The 3D quilt construction prevents cold spots and enhances loft.
• Spacious internal room lets your body move without collapsing insulation.
• Lower module can be cinched for tighter thermal sealing.

11. Survival Function (Extreme Conditions)

• The hood area can be nearly fully closed to reduce frostbite risk if your tent fails in heavy frozen-snow conditions.
• Safety note: Do not fully seal the hood — always allow airflow to prevent oxygen depletion.

12. Summary

ICEFLAME’s ThermoFlex Module system delivers:

• All-season adaptability
• True modular flexibility
• Premium RDS-certified down
• PFAS-free materials
• Lightweight packability
• A comfort level that feels closer to a home duvet than a traditional sleeping bag

Perfect for hikers, climbers, explorers, and anyone wanting a more customizable outdoor sleep experience.

👉https://outdoorul.com/product/product-ix-a-modular-sleeping-system/