FOX BASEFRAME PRO BODY ARMOR

Fox Baseframe Pro MTB Protective Shirt

The Fox Baseframe Pro Long Sleeve is a breathable, long-sleeved MTB protective shirt for riders who want shoulder, elbow, chest and back protection in one fitted system. It is designed primarily for trail, enduro, bike park and technical riding, where crashes, impacts and contact with the terrain are a real part of the ride, while you still want to keep as much mobility and breathability as possible.

Protection is provided by removable Koroyd® inserts with a patented auxetic structure – a special geometric design that adapts under load and combines mobility with effective impact energy management. The shoulders and elbows are certified to EN1621-1 Level 1, the back to EN1621-2 Level 1, and the chest to EN1621-3 Level 1. The mesh fabric helps wick away sweat and heat, while compression panels on the sides and sleeves keep the protective inserts close to the body and correctly positioned while riding.

The problem: more protection usually means more material, heat and restricted movement

In more aggressive MTB riding, you want to protect as many critical areas as possible, but classic protective armor often becomes heavy, hot and restrictive. When protection shifts, chafes or overheats, riders start to experience it as an obstacle rather than gear that helps them ride with more confidence.

The solution: shoulder, elbow, chest and back protection in one base layer

The Baseframe Pro Long Sleeve combines four key protection zones in one fitted shirt worn under your MTB jersey. The protective elements stay close to the body, while the compression construction helps reduce movement during braking, landings, quick direction changes and riding over rough terrain.

What does an auxetic Koroyd® structure mean?

An auxetic structure is a special geometric material design that behaves differently under load than conventional materials. Its internal geometry allows the protection to adapt to the body's movement while effectively managing impact energy, making it suitable for protective gear where both mobility and impact absorption matter.

Koroyd® shoulder and elbow protection – EN1621-1 Level 1

The protective inserts on the shoulders and elbows are certified to EN1621-1 Level 1. This matters especially in crashes, where the shoulders and elbows are often among the first parts of the body to come into contact with the ground, rocks or other obstacles.

Koroyd® back protection – EN1621-2 Level 1

The back protection meets the EN1621-2 Level 1 standard and is designed to reduce energy transfer from impacts to the back of the torso.

Koroyd® chest protection – EN1621-3 Level 1

The chest protection insert is certified to EN1621-3 Level 1 and complements the back, shoulder and elbow protection for more complete coverage of the upper body.

Why do long sleeves matter?

The long sleeve allows protection to be integrated over the elbows as well, so the Long Sleeve version offers more coverage than the sleeveless or short-sleeve versions. This makes sense for riders who ride faster, on more technical terrain, or in bike parks, where crashes and arm contact with the ground are more frequent.

Compression sleeves help keep protection in place

The sleeves aren't just there for coverage. The compression design helps keep the elbow and shoulder inserts snug against the body, reducing movement of the protection while riding and providing a more consistent feel on rough terrain.

Breathable mesh fabric for less overheating

The main material uses a mesh construction that improves airflow and helps wick away sweat. This is essential on long climbs, enduro stages and warmer days, when excess heat quickly builds up under classic armor.

Snug fit for stable protection

The Baseframe Pro Long Sleeve is designed as a fitted base layer. The snug fit isn't just about looks - it's functional, helping keep the protective inserts in place and reducing unwanted movement during active riding.

Wide neckline for comfort under your jersey

The wide neckline reduces the amount of material around the neck and makes it easier to combine with an MTB jersey and other protective gear.

YKK® zipper for easier on and off

Since the fit needs to be snug enough to keep the protection stable while riding, a YKK® zipper at the bottom makes it easier to put on and take off the shirt without needing a looser cut.

Removable Koroyd® inserts for easier cleaning

The Koroyd® protective inserts are removable, making it easier to clean and maintain the shirt after dusty, muddy or particularly sweaty rides.

Who is the Fox Baseframe Pro Long Sleeve for?

It's suitable for enduro, trail and bike park riders who want maximum upper-body coverage without switching to heavy, rigid classic armor. It's particularly useful for technical descents, jumps, rocky terrain, bike parks and riding where you also want to protect your elbows.

Baseframe Pro Long Sleeve, Short Sleeve or Sleeveless?

Sleeveless is the most minimalist version and mainly protects the chest and back. Short Sleeve adds certified shoulder protection. Long Sleeve extends protection to the elbows as well, offering the most coverage within the Baseframe Pro family.

Why choose the Fox Baseframe Pro Long Sleeve?

The Baseframe Pro Long Sleeve is designed for riders who want more than basic torso protection. Its value lies in the combination of Koroyd® shoulder, elbow, back and chest protection, auxetic construction, breathable material and a compression fit. It's a protective layer for rides where you want serious coverage, but still need mobility, breathability and the feeling that the protection works with your body, not against it.

Features:

• Long-sleeved MTB protective shirt.
• Shoulder, elbow, chest and back protection.
• Removable Koroyd® protective inserts.
• Patented auxetic Koroyd® structure for high mobility.
• Koroyd® shoulder and elbow protection: EN1621-1 Level 1.
• Koroyd® back protection: EN1621-2 Level 1.
• Koroyd® chest protection: EN1621-3 Level 1.
• Breathable mesh construction.
• Material helps wick away sweat while riding.
• Side compression panels keep protection close to the body.
• Compression sleeves help stabilize shoulder and elbow protection.
• Fitted cut for a stable position of the protective inserts.
• Wide neckline for comfort and easier wear under an MTB jersey.
• YKK® zipper for easier on and off.
• Removable inserts for easier cleaning.
• Suitable for trail, enduro, bike park and technical MTB riding.

Materials:

• 58% polyester, 24% polyamide (nylon), 18% elastane.

Recommended use:

• Trail MTB.
• Enduro.
• Bike park.
• Technical descents.
• Jumps and more demanding lines.
• Riding where you want shoulder, elbow, chest and back protection in one system.