The FLEX-AST 5 Denim Pants are protective riding jeans reimagined for everyday wear. Designed with a lightweight monolayer stretch denim construction and a clean, tapered fit, they deliver all-day comfort and casual styling without compromising on safety. Engineered to exceed performance specifications and CE certification standards, these jeans offer discreet, built-in protection with refined detailing and a modern wash and finish—making them an ideal choice for riders who want all-day comfort and everyday practicality with built-in moto-specific protection.
Premium Comfort: Lightweight monolayer denim with built-in mechanical stretch offers riders premium comfort and everyday wearability.
Tailored Fit: Regular tapered fit for a modern silhouette that transitions effortlessly from road to street.
Adjustable Armour Placement: Three-position adjustable knee protector pockets allow for a personalised fit and optimal impact coverage.
Protective Armour Inside: Equipped with Nucleon Flex Plus knee armour for enhanced comfort, breathability and premium protection.
Engineered for Performance: Designed to meet Alpinestars’ FLEX-AST comfort specifications, the high-performance monolayer construction delivers lightweight durability and long-lasting comfort.
Comfortable Stretch Blend: Durable, lightweight fabric composition of 53% cotton, 30%+ polyester, and 17% polyamide offer a lightweight feel with built-in stretch for all-day comfort across varying climates.
Durable Construction: Hidden external double stitching and overlock seams ensure long-term structural integrity and lasting performance in impact-prone areas.
Ventilated Armour Pockets: Lightweight and breathable protector pockets are designed to maintain airflow, while securing the armour for effective impact protection and enhanced comfort.
Ergonomic Waistline: A raised back waist provides enhanced coverage and comfort in the riding position.
Functional Storage: Deep, easy-access hand pockets are designed for practicality—even while seated on the bike—keeping essentials secure and within reach.
Classic Denim Aesthetic: Heritage-inspired details include selvedge-look interior seam stitching with colour contrast thread and subtle Alpinestars logo embroidery on the coin pocket, delivering an authentic denim finish.
Nucleon Flex Plus Knee Armour: Level 1 slim-profile protectors with 3D shaping and breathability for all-day comfort and protection.
Knee Protector Positioning Pocket: the pants feature 3-position, adjustable knee armour pocket, for convenient positioning of the protectors for an optimal coverage and a perfectly tailored fit.
Hip Protection Ready: Compatible with optional Bioflex Level 1 hip protectors—flexible, adaptive, and low-profile for discreet safety.
Certified A Garment: Meets the safety standards as a CE certified Class A Garment, ensuring optimal protection and performance.
Certified Safety Performance: Exceeds CE abrasion and tear strength thresholds by 20% in final wash and finish.
