Castelli Squall Shell Men's – The ultralight waterproof jacket for riding in all weather conditions

95 g of protection. A waterproof membrane. Minimal bulk.

Discover the Castelli Squall Shell Men's Jacket, a technical rain jacket designed for cyclists who want effective protection from the elements without adding bulk to their gear.

With its two-layer stretch fabric with a waterproof membrane, its taped seams, and a stated weight of just 95 g, it offers an excellent balance of lightness, protection, and practicality.

Packable, it is easy to carry in a jersey pocket to accompany you on rides when the weather is uncertain.

Whether you are facing a sudden downpour, an exposed mountain descent, or a particularly chilly morning start, the Squall Shell provides extra protection without sacrificing freedom of movement.

Key features of the Castelli Squall Shell

• Two-layer waterproof membrane: effectively protects against rain.

• Taped seams: limit water penetration at the seams.

• Ultralight weight of 95 g: protection that is easy to carry.

• Packable construction: easily fits into a jersey pocket.

• Full wind protection: limits cooling during descents and in windy conditions.

• Stretch fabric: adapts to different clothing layers.

• Regular fit: comfortable over a jersey or light layer.

• Elasticated cuffs and hem: reduce cold air and water ingress.

• Reflective rear band: improves visibility in low light.

• Recommended temperatures of 4 to 18°C: ideal for cool and changeable conditions.

A true waterproof membrane

Unlike a simple water-repellent windbreaker, the Castelli Squall Shell features two-layer technical fabric with a waterproof membrane.

This construction forms a barrier against rain and water spray while maintaining excellent flexibility.

It allows you to keep riding when conditions deteriorate without having to carry a heavy and bulky rain jacket.

The Squall Shell is therefore particularly suited for long rides, mountain routes, and training sessions when showers are forecast.

Taped seams: enhanced protection

Castelli has equipped the Squall Shell with taped seams, an essential feature for a waterproof jacket.

On a conventional jacket, water can penetrate through the small holes created when the different panels are sewn together.

Sealing tapes applied to the seams help prevent this penetration.

Combined with the waterproof membrane, they provide consistent protection from the elements.

Only 95 g: protection without the weight

With a stated weight of 95 g, the Castelli Squall Shell is one of the lightest rain jackets available.

Its minimal bulk means you can almost always carry it on your rides.

It folds down easily to fit into a jersey back pocket without taking up all the space reserved for your nutrition or accessories.

A major advantage when you want to be ready to face unpredictable weather.

Ideal wind protection in the mountains

The Squall Shell does more than just protect against rain.

Its membrane also forms a barrier against the wind, helping to reduce the sensation of cold during descents.

After a long climb, when the body is damp with sweat and speed increases, a windproof jacket can make a real difference to comfort.

The Squall Shell is therefore an excellent additional layer for mountain routes and mid-season rides.

Stretch fabric for greater versatility

Castelli uses stretch fabric that moves with the cyclist.

This flexibility allows you to wear the jacket over a simple jersey or a thicker layer when temperatures drop.

Its Regular fit provides enough room to layer clothing without creating excessive bulk.

A versatile design, suited for both sporty rides and long days in the saddle.

Elasticated cuffs and hem: limit ingress

The Squall Shell features elasticated cuffs and hem.

They help keep the jacket properly positioned while pedaling and limit the entry of cold air.

These finishes also help reduce water ingress in exposed areas.

A simple but important detail when riding in the rain or during a fast descent.

Reflective band to improve visibility

A reflective band is integrated into the back of the jacket.

It improves the cyclist's visibility when illuminated by the headlights of other road users.

This feature is particularly useful on rainy days, early morning rides, and training sessions when visibility is reduced.

It complements the use of suitable bike lighting.

A jacket suited for 4 to 18°C

Castelli recommends the Squall Shell for temperatures between 4 and 18°C.

This temperature range depends notably on the clothing worn underneath, the intensity of the effort, and the weather conditions.

The Squall Shell is primarily a protective jacket, not a jacket with thick thermal insulation.

In cold weather, it can be worn with a technical base layer and a thermal jersey to complete the protection.

What activities is the Castelli Squall Shell suited for?

The Squall Shell is particularly suited for cyclists who want to stay protected without carrying a bulky jacket.

It is especially suitable for:

• Long road cycling rides.

• Training in uncertain weather.

• Gran fondos and mountain races.

• Cool and windy descents.

• Spring and autumn cycling camps.

• Gravel rides on rolling roads.

• Triathlon preparation cycling training.

• Rides where rain can arrive without warning.

Castelli Squall Shell or Emergency 3 Rain: which should you choose?

The Castelli Squall Shell prioritizes lightness, compactness, and protection from showers.

At just 95 g, it is particularly appealing as an emergency jacket to keep in a jersey pocket.

The Castelli Emergency 3 Rain features a three-layer construction with a design more focused on structured rain protection.

For cyclists who want an ultralight jacket to carry on every ride, the Squall Shell is an excellent choice.

For those who regularly ride in the rain and prefer a more robust construction, the Emergency 3 Rain is also worth considering.

Why choose the Castelli Squall Shell from Triathlon Store?

At Triathlon Store, we select equipment that meets the real needs of cyclists and triathletes: protection, comfort, performance, and ease of use.

The Castelli Squall Shell perfectly illustrates this philosophy.

With its waterproof membrane, taped seams, and ultralight weight, it allows you to ride with greater peace of mind when the weather is uncertain.

Whether you are preparing for a gran fondo, a cycling trip to Girona, or the long rides of your IRONMAN preparation, this jacket is a particularly useful piece of equipment to keep in your jersey pocket.

Castelli Squall Shell: 95 g of protection so the weather never decides your ride.

FAQ

Is the Castelli Squall Shell really waterproof?

Yes. It has a waterproof membrane and taped seams. Castelli gives it a waterproof rating of 5/5.

Can this jacket fit into a jersey pocket?

Yes. With its stated weight of 95 g and its packable construction, it is designed to be easily carried in a back pocket.

What is the difference between a Squall Shell jacket and a simple windbreaker?

The Squall Shell combines protection against the wind with a genuine waterproof membrane. A conventional windbreaker is generally less protective against the rain.

Is it suitable for winter rides?

Yes, when worn with suitable thermal layers. The jacket itself is not designed as a thick winter jacket.

What is the difference between Squall Shell and Emergency 3 Rain?

The Squall Shell prioritizes ultralightness and compactness. The Emergency 3 Rain features a more structured three-layer construction.

How does the Castelli Squall Shell fit?

Its Regular fit allows you to wear it over a jersey or another layer. Consult the Castelli size guide; if you are between two sizes, choose the larger size.