Fortis Ladies Calor Jacket

Fortis Ladies Calor Jacket

The Fortis Ladies Calor Jacket is a lightweight insulated jacket designed to trap warmth without the bulk of traditional winter layers. Deceptively thin, highly breathable, and easy to wear, it provides impressive warmth for its weight while maintaining the freedom of movement needed for active outdoor use.

Manufactured in Devon, UK, the jacket combines modern recycled insulation with stretch performance fabrics to create a versatile layer that works equally well on its own in cool weather or beneath a waterproof shell when conditions deteriorate. For many users, it serves as the perfect insulating companion to the Fortis Stowaway Jacket, creating a lightweight layering system that balances warmth, weather protection, and comfort.

The jacket uses a 4-way stretch nylon-spandex outer and inner fabric that moves naturally with the body. Unlike bulky insulated jackets that can feel restrictive during activity, the Calor maintains close fitting comfort while allowing unrestricted movement through the shoulders, arms, and torso. The soft fabric construction sits comfortably against the body and performs particularly well during walking, field sports, travel, and general outdoor use.

At the heart of the jacket is ultra-light 40gsm Clo® Vivo insulation. Produced using recycled fibres made from plastic bottles, this advanced synthetic insulation traps body heat efficiently while remaining breathable and low in weight.  The result is a jacket that feels surprisingly light when worn yet delivers dependable warmth when temperatures fall.

Despite the warmth it delivers, it easily packs down into the bottom of a rucksack or even a larger pocket.  As a result, this is a fantastic piece to keep in the car for when you need that extra bit of warmth on the go.

Fortis Ladies Calor Jacket Key Features

• Lightweight insulated construction for everyday outdoor use
• 40gsm Clo® Vivo synthetic insulation
• Insulation made from recycled plastic bottles
• 100% recycled insulation fibres
• 4-way stretch nylon-spandex fabric
• Breathable design for active comfort
• Integral hood for additional warmth
• Secure lower zip pockets
• Adjustable drawcord hem
• Packs down easily for travel and layering
• Manufactured in Devon, UK

An integral hood provides additional protection against cold air, while lower zip pockets keep essentials secure during everyday use. The adjustable drawcord hem helps seal in warmth when conditions become cooler, improving thermal efficiency without compromising comfort. Combined with the jacket’s breathable design, these features help create a practical layer suited to changing temperatures and active outdoor lifestyles.

The Fortis Ladies Calor Jacket is ideal for women seeking lightweight warmth without the bulk associated with heavier insulated outerwear. It excels as an insulating mid-layer beneath the Fortis Stowaway Jacket and performs equally well as a standalone outer layer in cool, dry conditions. The close-fitting design promotes thermal efficiency, although those planning to wear thick layers underneath may prefer to size up for additional room.

Whether you’re building a versatile layering system, walking through the countryside, travelling light, or simply looking for reliable everyday warmth, the Fortis Ladies Calor Jacket delivers exceptional insulation, comfort, and mobility in a remarkably lightweight package. Its blend of recycled materials, British manufacturing, and practical performance makes it an excellent choice for women who value warmth without unnecessary weight.

Frequently Asked Questions

Q: What is the Fortis Ladies Calor Jacket designed for?
A: The Fortis Ladies Calor Jacket keeps you warm without adding excessive bulk, making it ideal for layering and everyday outdoor use.

Q: Is the Calor Jacket waterproof?
A: No. It is an insulating layer and is best paired with a waterproof shell in wet weather.

Q: Can I wear it under a Fortis Stowaway Jacket?
A: Yes. It works exceptionally well as an insulating layer beneath a Stowaway Jacket.

Q: What insulation does the jacket use?
A: It uses 40gsm Clo® Vivo synthetic insulation made from recycled plastic bottles.

Q: Does the jacket restrict movement?
A: No. The 4-way stretch fabric allows excellent freedom of movement.

Q: Is the jacket bulky?
A: No. It delivers impressive warmth while remaining lightweight and low profile.

Q: Should I size up for layering?
A: Consider sizing up if you regularly wear thick insulating layers underneath.

Q: Where is the Fortis Ladies Calor Jacket made?
A: It is manufactured in Devon, United Kingdom.

Q: Is the insulation made from recycled materials?
A: Yes. The insulation uses 100% recycled fibres derived from plastic bottles.

Q: Who benefits most from this jacket?
A: Active outdoor users wanting lightweight warmth and flexible layering options.

Fortis Ladies Calor Jacket Sizing Guide

Regular Fit. A comfortable, easy fit for everyday wear.

Size	6	8	10	12	14	16	18	20
Bust (In)	32-34	34-36	36-38	38-40	40-42	42-44	44-46	46-48
Sleeve length (In)	30	30	30.5	31	31	31.5	32	32.5
Back Length (In)	27.5	28	28	29	29	30	31	31

Technical Specification

Product Name	Fortis Ladies Calor Jacket
Brand	Fortis
Outer Material	4-Way Stretch Nylon-Spandex
Inner Material	4-Way Stretch Nylon-Spandex
Material Composition	82% Recycled Nylon, 18% Spandex
Insulation	40gsm Clo® Vivo Synthetic Insulation
Insulation Fibre Content	100% Recycled Fibres
Hood	Integral Hood
Pockets	Lower Zip Pockets
Hem	Adjustable Drawcord Hem
Manufacture Location	Devon, UK
Properties	Insulated, Stretch, Breathable, Packable
Recommended Layering	Suitable Under Fortis Stowaway Jacket

Fortis Ladies Calor Jacket Performance Overview

Waterproofing	1/5
Breathability	4/5
Durability	1/5
Wind Resistance	3/5
Weight	3/5
Mobility	4/5
Thermal Rating	4/5