FOX BASEFRAME PRO SLEEVELESS BODY ARMOR

MTB Protective Sleeveless Vest Fox Baseframe Pro Sleeveless

Fox Baseframe Pro Sleeveless is a breathable protective sleeveless vest for mountain biking, designed for riders who want certified chest and back protection without putting up with the stiff, heavy and hot feel of classic protective armor. It is worn as a close-fitting base layer under an MTB jersey and is especially suited to trail, enduro, bike park and technical riding, where freedom of movement and good breathability matter just as much as protection.

The core of the protection consists of removable Koroyd® inserts with a patented auxetic structure – a special geometric design that adapts under load, allowing a combination of flexibility and efficient impact energy management. The back protector is certified to the EN1621-2 Level 1 standard, while the chest protector is certified to EN1621-3 Level 1. The breathable mesh fabric helps dissipate heat and sweat, while the compression side panels keep the protective inserts stable and close to the body while riding.

The problem: you want protection but don't want to ride in heavy armor

With body protection, the biggest compromise is usually the same: more protection means more material, more weight, more heat and less natural movement. On long climbs, technical sections and active movement on the bike, a stiff protective vest can quickly become a hindrance. The Fox Baseframe Pro Sleeveless is designed specifically for riders who want to reduce this compromise.

The solution: certified protection that stays close to the body

The Baseframe Pro uses a chest and back Koroyd® protection system integrated into a close-fitting base layer. Instead of feeling like separate armor, the protection follows the body, and the compression panels help prevent unwanted movement of the inserts during descents, jumps, braking and riding over rough terrain.

What is the auxetic Koroyd® structure?

The auxetic structure is a special geometric material design that behaves differently from ordinary materials under load. Its internal geometry allows the structure to adapt to movement and impacts, so Koroyd® protection can combine high flexibility with efficient energy management on impact.

Koroyd® back protection – EN1621-2 Level 1

The back Koroyd® insert meets the European EN1621-2 Level 1 standard for back protection. For a rider, this means a certified protective solution for the spine and back area, where the consequences of a direct impact can be particularly severe.

Koroyd® chest protection – EN1621-3 Level 1

The chest protector is certified to the EN1621-3 Level 1 standard. It protects the front of the torso and complements the back protection, so the Baseframe Pro doesn't just act as a spine protector but protects key areas of the torso as well.

Why is a stable position of the protector so important?

Protection is only useful if it stays where you need it while riding. The side compression panels wrap around the torso and help hold the Koroyd® inserts close to the body, reducing movement of the protection during position changes, jolts, landings and fast riding through technical terrain.

Breathable mesh construction for intense MTB riding

The Baseframe Pro is made from breathable mesh fabric that allows air to flow and helps dissipate sweat. This is especially important in enduro riding, where a long climb can be followed by an aggressive descent, and in warmer conditions, when classic protective armor quickly becomes uncomfortably hot.

Sleeveless design for more freedom in the shoulders

The sleeveless construction leaves the shoulders and arms unrestricted. This allows more natural movement of the upper body when cornering, bunny hopping, jumping, descending steep sections and making quick position changes on the bike.

Close-fitting cut for wearing under an MTB jersey

The Baseframe Pro is designed as a base layer, so it fits snugly to the body and can be worn under a regular MTB jersey. The wide neckline increases comfort and reduces the feeling of excess material around the neck, while also making it easier to combine with other cycling gear.

Removable Koroyd® inserts for easier maintenance

The chest and back Koroyd® inserts are removable, making it easier to clean the protective vest after a muddy or very sweaty ride. This design is particularly important for gear worn directly against the body and used frequently.

YKK® zipper for easier putting on and taking off

Because of its compression and body-hugging fit, the protection needs to sit tight enough to stay stable while riding. The YKK® zipper at the bottom makes it easier to put on and take off, while allowing the vest to maintain a snug and secure fit during use.

When is the Fox Baseframe Pro the right choice?

The Baseframe Pro is especially suited to enduro, trail and bike park riders who ride faster, choose more demanding lines or regularly ride rocky, rooty and technical terrain. It is also suitable for riders who would often leave classic protective armor at home due to its weight or heat, but still want certified body protection.

Why choose the Fox Baseframe Pro Sleeveless?

With the Baseframe Pro, you're not just paying for an extra layer of material. Its value lies in the combination of certified chest and back protection, Koroyd® auxetic structure, breathable base layer, compression fit and high mobility. It's designed for riders who want to use protection regularly, so it needs to be comfortable and flexible enough that you won't want to take it off while riding.

Features:

• Protective sleeveless vest for mountain biking.
• Designed as a base layer under an MTB jersey.
• Removable Koroyd® protective inserts for chest and back.
• Patented auxetic Koroyd® structure for high mobility.
• Koroyd® back protection: EN1621-2 Level 1.
• Koroyd® chest protection: EN1621-3 Level 1.
• Breathable mesh fabric for better airflow.
• Material helps wick away sweat during intense riding.
• Side compression panels help keep the protective inserts close to the body.
• Close-fitting cut for a stable position of the protection.
• Sleeveless design for greater freedom of movement in the shoulders and arms.
• Wide neckline for more comfort under an MTB jersey.
• YKK® zipper for easier putting on and taking off.
• Removable protective inserts for easier cleaning of the vest.
• Suitable for trail, enduro, bike park and technical MTB riding.

Materials:

• 75% polyester, 12% polyamide (nylon), 13% elastane.

Recommended use:

• Trail MTB.
• Enduro.
• Bike park.
• Technical descents.
• Rocky and rooty terrain.
• Riding where you want chest and back protection with as little restriction of movement as possible.