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Innovative Fabric Chosen by Blue Monte: Octa®

Blue Monte が選んだ革新的ファブリック —— Octa®(オクタ)

For Fall/Winter 2025, Blue Monte has adopted Teijin Frontier's high-performance material Octa® as its main material in pursuit of "lightness, warmth, and comfort."


Insulation, quick-drying properties, and ease of movement are all essential for outdoor wear.

Octa® was our chosen answer to achieve all of these in a single garment.

What is Octa®?

A unique, multi-lobal polyester fiber with eight protrusions, in addition to a hollow structure.

This innovative material simultaneously achieves lightness, breathability, and warmth through its special octopus-leg-like structure.


Hollow fiber + 8 "legs" → creates an air layer, making it light, warm, and quick-drying.

Why Octa® is superior

■ Surprisingly Light — Lightweight

Approximately half the weight of ordinary polyester of the same thickness.

Provides stress-free comfort even with multiple layers in fall and winter.

■ Comfortable even when sweating — Moisture-wicking and quick-drying

The hollow structure and radial protrusions quickly absorb and disperse sweat.

Prevents "sweat chill" common in winter activities.

■ Traps air for warmth — Insulation & Heat Shielding

Retains "dead air" (still air) between the hollows and protrusions of the fibers.

Achieves light yet warm, ideal insulation for winter.

■ Adapts to movement — High Breathability

Even with its thickness, it prevents stuffiness.

Comfortable for both outdoor scenes and urban use.

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