Ultra-flexible → 4-way stretch fabric for complete freedom of movement. • Lightweight and efficient → 40% lighter than the previous version. Reinforced knees → Protection against abrasion and shocks. Optimized ventilation → Laser cuts for better breathability. Water-repellent treatment → Repels water, mud and dust. Precise fit → Micrometric buckle and Velcro for a personalized fit.

Machine wash at 30°C (without fabric softener). Air dry , avoid tumble drying. To maintain the water-repellent treatment, use a reactivator spray after several washes.

Evolve SI2 Pants - Adult

Q: SI2 pants, for whom?

Designed for demanding BMX and mountain bike riders, the SI2 combines flexibility, lightness and durability . Whether you're competing or in a committed session, it supports you without compromise.

Q: Can you wear protection underneath?

Absolutely! Its ergonomic cut leaves enough space for knee pads without compromising comfort.

Q: What size should I choose?

Available in adult and child sizes . Precise fit thanks to Velcro and micrometric adjustments . Check out our size guide to find the perfect fit.

Q: Can I return it if the size doesn't fit?

Yes, you have 30 days to exchange or refund your item, provided it hasn't been worn in the field. See our terms and conditions.

€119,95

Designed for limitless movement, the SI2 is an ultra-lightweight, hyper-flexible pant crafted for riders who push their limits. Its 4-way stretch fabric moves fluidly with every motion, while its ergonomic fit ensures total comfort. Reinforced where needed, ventilated in key areas, and treated to repel water and dust, it adapts to all conditions. Adjustable and available for all body types, it is manufactured in GRS-certified workshops for a responsible commitment.

Adult

Size: 28

KIDS

Size	Waist size (cm)	Hip circumference (cm)	Inseam (cm)	Leg length (cm)
Y18	53 - 55	80 - 82	61	72.5
Y20	55 - 57	82 - 84	63	75
Y22	57 - 59	84 - 86	65	77.5
Y24	59 - 61	86 - 88	67	80.5
Y26	61 - 65	88 - 90	72	85
Y28	65 - 70	90 - 95	76.5	90
Y30	70 - 75	95 - 100	79	95

ADULTS

Size	Waist size (cm)	Hip circumference (cm)	Inseam (cm)	Leg length (cm)
28	70 - 75	90 - 95	76	92
30	75 - 80	95 - 100	77	95
32	80 - 85	100 - 105	79	97
34	85 - 90	105 - 110	80	100
36	90 - 95	110 - 115	82	102
38	95 - 100	115 - 120	83	105
40	100 - 105	120 - 125	85	107

⚠️ Measurements are given as a guide and may vary slightly depending on the model.

Color: Black

Black

Product variants

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Evolve SI2 Pants - Adult

28 / Black

€119,95

Product details

Description

The Perfect Balance Between Performance and Durability

At Evolve, every product is designed, tested, and improved with one goal in mind: to provide riders with the best possible gear. After a year and a half of development in collaboration with elite rider Michael Bias, we created the SI2—pants that combine lightness, flexibility, and durability without compromise.

- Total Freedom, Minimal Weight

Thanks to its 4-way stretch fabric, the SI2 adapts seamlessly to movement. Its innovative textile is up to 40% lighter than the previous version, providing a smooth feel and optimal responsiveness on the track.

- Reinforced Where It Matters

We know the knees take a beating. That’s why we’ve integrated reinforced patches capable of absorbing abrasion and repeated impacts. Its ergonomic fit naturally follows the rider’s position while leaving enough room for protective gear if needed.

- Smart Ventilation for Maximum Comfort

Riding hard shouldn’t mean overheating. The SI2 features strategically placed laser-cut vents and breathable fabric at the back of the legs. The goal? To ensure optimal airflow and maintain a fresh feeling, even during intense efforts.

- A Shield Against Moisture and Dust

Conditions aren’t always perfect—and that’s a good thing. With its water-repellent treatment, the SI2 effectively repels water, mud, and dust, so nothing gets in the way of a great session.

- A Precise Fit for Everyone

Available in both adult and youth sizes, the SI2 adapts to all body types with a micrometric closure buckle and Velcro waist adjustments. For a secure fit, we’ve also integrated silicone grip strips directly into the waistband.

- A Strong Commitment to the Future

At Evolve, we don’t just create high-performance gear—we’re also committed to a more responsible future. That’s why the SI2 is manufactured in Global Recycled Standard (GRS)-certified workshops, ensuring the use of recycled materials and compliance with strict environmental standards.

Technical description

• Main Material: Ultra-light 4-way stretch fabric (40% lighter than the previous version)
• Reinforcements: Abrasion-resistant knee patches for enhanced durability
• Ventilation: Laser-cut vents and breathable fabric at the back of the legs
• Treatment: Water-repellent to resist water, mud, and dust
• Fit: Micrometric buckle + Velcro adjustments at the hips
• Support: Integrated silicone grip strips in the waistband
• Sizes: Available in adult and youth versions
• Manufacturing: Produced in Global Recycled Standard (GRS)-certified workshops

A pant designed for performance, comfort, and durability.

Evolve Gear Co

FAQ

Got a question? Our FAQ probably has the answer!

SI2 pants, for whom?

Designed for demanding BMX and mountain bike riders, the SI2 combines flexibility, lightness and durability . Whether you're competing or in a committed session, it supports you without compromise.

Why choose the SI2?

Ultra-flexible → 4-way stretch fabric for complete freedom of movement. • Lightweight and efficient → 40% lighter than the previous version.
Reinforced knees → Protection against abrasion and shocks.
Optimized ventilation → Laser cuts for better breathability.
Water-repellent treatment → Repels water, mud and dust.
Precise fit → Micrometric buckle and Velcro for a personalized fit.

Can you wear protection underneath?

Absolutely! Its ergonomic cut leaves enough space for knee pads without compromising comfort.

What size should I choose?

Available in adult and child sizes .
Precise fit thanks to Velcro and micrometric adjustments .
Check out our size guide to find the perfect fit.

Do you ship internationally?

Yes, we ship to several countries. See our shipping policies for more details.

How to maintain it?

Machine wash at 30°C (without fabric softener).
Air dry , avoid tumble drying.
To maintain the water-repellent treatment, use a reactivator spray after several washes.

Can I return it if the size doesn't fit?

Yes, you have 30 days to exchange or refund your item, provided it hasn't been worn in the field. See our terms and conditions.