Alpinestars Bionic Plasma LT Youth Protector Jacket (With Long Sleeves)
Are you looking for uncompromising protection for your child on the track that won't restrict their movement even when performing demanding tricks? The Alpinestars Bionic Plasma LT Youth Protection Jacket LS is designed specifically for young off-road riders involved in disciplines like BMX race, downhill, enduro, or riding in bike parks. This lightweight long-sleeve jacket provides a premium body protection solution ("body armor rig") that combines certified back, chest, shoulder, and elbow protectors in a single piece. Thanks to advanced eco-friendly viscoelastic material technology, it gives young bikers maximum safety during crashes without losing the precious flexibility required for full control over the bike.

Key Features of the Protectors
Nucleon Plasma Material: Soft, intelligent protection made of USDA-certified bio-based material which, thanks to its open cell structure, perfectly contours to the body and hardens instantly upon impact.
Absence of Hard Plastics: The jacket contains no hard plastics, making it extremely comfortable, completely unrestrictive for the young rider, and fitting perfectly directly on the body.
Complete CE Level 1 Certification: Fully approved and tested protection for the back (EN 1621-2:2014), chest (EN 1621-3:2018), and shoulders & elbows (EN 1621-1:2012).
Multi-panel Construction: Made of several elastic and mesh materials for excellent ventilation, sweat-wicking, and the option to wear the jacket directly against bare skin.
Extended Protection Zones: Additional integrated padding on the outer arms (biceps) and sides for reliable protection against flying stones and abrasions during slides.
Easy Maintenance and Washing: All Plasma protector inserts are completely removable, allowing for quick washing of the textile jacket itself in a washing machine.
Intelligent Molecular Protection: Nucleon Plasma with a Bio-Base
The protective elements of this jacket are made of revolutionary Nucleon Plasma viscoelastic polymer, which has earned the eco-friendly USDA Bio-based certification. The protectors feature an open structure of interconnecting cells, are incredibly lightweight, and are pliable in all directions, allowing the ergonomic design to adapt precisely to the anatomy of a youth body. The jacket contains no conventional hard plastics – as soon as the material warms up to body temperature, the rider barely feels the armor and maintains absolute freedom of movement. The magic of this technology lies in the fact that upon impact, the protector's molecules instantly change their structure, harden, and effectively absorb and disperse impact energy. To ensure long-lasting durability during intense trail riding, the front section and protector pockets are covered with a highly abrasion-resistant yet comfortable outer fabric, which significantly increases resistance to tearing.

What does the USDA Bio-based certification mean in practice?
This term might sound unnecessarily complex, but for riders, it brings a huge benefit. This official certification is awarded by the US Department of Agriculture to products that demonstrably use renewable natural and plant-based resources instead of traditional petroleum and synthetic chemicals. Alpinestars has managed to develop a cutting-edge high-tech polymer material that makes zero compromises on safety but is significantly more eco-friendly and gentler on sensitive youth skin. As a result, the protector does not smell of aggressive chemicals while retaining the extreme durability and shock-absorbing properties you would expect from professional racing gear.

Perfect Ergonomics, Protector Stability, and Cooling Chassis
The base structure consists of a sophisticated multi-panel construction made of several materials. Its main part is formed by a soft, highly tactile, and highly breathable stretch mesh, which ensures constant airflow and excellent thermoregulation even during maximum physical output on the track. This combination of materials perfectly wicks away sweat and ensures that the jacket stays firmly in place, making it possible to use and wear directly on bare skin. For the protectors to perform 100%, they must sit completely still on the body. Alpinestars has therefore equipped the jacket with a height-adjustable and removable back strap system with hook-and-loop fastening, which allows precise positioning of the back protector according to the child's height. The stability of the chest plate is ensured by adjustable side belts and rotating strap buckles, which automatically adapt to different youth body shapes and eliminate any unwanted and annoying movement of the jacket during aggressive riding.

Enhanced Roost Protection and Premium Zipper
For maximum user comfort and easy dressing, the jacket is equipped with an ergonomic, offset front/side YKK® zipper featuring a mechanical lock (locking zipper). This reliably prevents accidental opening of the jacket during a wild ride and, thanks to its clever placement, does not press against the middle of the chest under the protector. A major benefit that will be appreciated especially by racers in mass BMX race starts or during tight riding in a bike park is the integrated padding on the upper arms (biceps) and sides in the hip areas. These foam panels provide an extra shield against flying stones and trail debris, significantly mitigating the consequences of unpleasant side falls and slides.

Technical Specifications
Parameter / Component Value / Specification
Product Code 6540126
Intended Use and Disciplines Youth / junior bike armor (BMX race, downhill, enduro, bike park)
Protector Technology Nucleon PLASMA (USDA certified bio-based viscoelastic polymer without hard plastics)
Chassis Material Multi-panel construction, soft stretch mesh, abrasion-resistant textile
Zipper Type Offset front/side YKK® with mechanical lock against accidental opening
Safety Certification Back: EN 1621-2:2014 L1 / Chest: EN 1621-3:2018 L1 / Shoulders and Elbows: EN 1621-1:2012 L1
Jacket Weight Approx. 1,090 g (measured for size M)
Available Sizes S, M, L, XL
Frequently Asked Questions (FAQ)
How exactly do Nucleon Plasma protectors work, and are they truly comfortable for children?
Yes, they are exceptionally comfortable and represent a massive leap in comfort for children compared to old hard plastic shells. The Nucleon Plasma material is viscoelastic and soft. It responds to body heat, softening completely to adapt precisely to every movement of the young rider, so it never pinches, chafes the skin, or restricts the flexibility of the torso. It hardens instantly to safely absorb energy in the exact millisecond of an impact, making it the ideal protection for dynamic disciplines like BMX and downhill.

How do I properly maintain and wash the Alpinestars Bionic Plasma LT protector jacket?
Maintaining this jacket is designed with parents in mind to be as simple as possible. All Nucleon Plasma protective inserts from the shoulders, elbows, back, and chest are completely and quickly removable from their textile pockets. Once removed, you can safely wash the textile chassis made of stretch mesh in a washing machine (we recommend a gentle cycle at a low temperature). The protectors themselves just need to be wiped with a damp cloth if dirty and left to air dry.