The LS2 Stream II America delivers style, features, and performance that surpass helmets costing twice the price. Its aerodynamic, sport-styled shell is built from LS2’s proprietary Kinetic Polymer Alloy (KPA) — a nanotechnology material that blends microscopic aramid fibers with a high-end polymer for energy-managing flexibility without the ricochet effect of inferior materials. A.R.E.M. (Advanced Rotational Energy Management) technology meets ECE 22.06 rotational energy management specifications for certified rotational impact protection. The rear spoiler enables dynamic flow-through ventilation, while 3 shell sizes and 5 size-specific EPS liners deliver a fit that is nothing short of remarkable. The optically correct, Class A polycarbonate shield is Pinlock-ready for ultimate fog management (Pinlock insert sold separately).

Key Features

• KPA (Kinetic Polymer Alloy) shell — nanotechnology aramid fiber blend; energy-managing flexibility without ricochet
• A.R.E.M. (Advanced Rotational Energy Management) — ECE 22.06 certified rotational impact protection
• Rear spoiler — dynamic flow-through ventilation
• Class A polycarbonate shield — optically correct; Pinlock-ready (Pinlock insert sold separately)
• 3D laser-cut foam cheek pads — precise fit and all-day comfort
• Removable, washable liner with flex-crown comfort system
• 3 shell sizes and 5 size-specific EPS liners — exceptional fit across the size range
• Intermediate oval fit

Specifications

• Brand: LS2
• Model: Stream II — America
• Shell: Kinetic Polymer Alloy (KPA) — 3 shell sizes (XS–S / M–L / XL–3XL); nanotechnology aramid fiber blend
• Fit: Intermediate oval
• EPS: 5 size-specific liners
• Safety: A.R.E.M. (Advanced Rotational Energy Management)
• Shield: Class A polycarbonate, optically correct, Pinlock-ready (Pinlock sold separately)
• Ventilation: Rear spoiler — dynamic flow-through
• Liner: Removable, washable; 3D laser-cut cheek pads; flex-crown comfort system
• Certifications: DOT FMVSS 218, ECE 22.06
• Color: Matte Gray/Black
• Sizes: XS, S, M, L, XL, 2XL, 3XL