Alpinestars SM7 Core Helmet

• The SM7 Core Helmet is an off-road / motocross-style helmet, engineered specifically for off-road racing and high-performance riding. Alpinestars+2Rocky Mountain ATV/MC+2

• It’s designed to give a balance of superior ventilation, comfort, and strong impact protection — while remaining relatively lightweight. Alpinestars+2ExtremeSupply.com+2

🛠️ Construction & Materials

• The outer shell is a composite made from fiberglass, carbon, and Aramid fiber, giving a strong yet lightweight shell for impact protection and energy dissipation. Alpinestars+1

• Internally, there is a multi-layer design with EPS + liner — the liner is removable, made with 3D foam for comfort, and treated with anti-microbial finish for hygiene. SpazCycle+1

• Cheek pads are replaceable/interchangeable and offered in different thicknesses, letting you fine-tune the fit. Alpinestars+1

🎯 Protection & Safety Features

• The helmet’s shell has an aerodynamic, smooth, streamlined profile — with no external channels or protrusions that might create load points on impact, helping deflect and dissipate energy. Alpinestars+1

• It uses patented “PLASMA” technology at the lower side-edge of the shell, which increases shock absorption — especially in areas near the collarbone, helping reduce injury risk in critical impact zones. Alpinestars+1

• The visor is built with a detachment system: on impacts over a certain energy threshold (15 Joules), the visor automatically detaches, reducing risk of rotational injury or shell compromise. Alpinestars+1

• The helmet meets industry safety standards: it is homologated to both ECE 22.06 and DOT standards. MX Rider+1

• It also reportedly exceeds the ECE 22.06 standard’s peak rotational acceleration requirements by a significant margin (some sources say ~76% better performance). MX Rider+1

💨 Comfort & Practical Features

• Ventilation: 20 intake/exhaust vents (13 intakes + 7 exhausts) — quite robust ventilation, which is especially helpful during off-road or high-exertion riding. Alpinestars+2partseurope.eu+2

• Fit customization: thanks to “shell sizing” — the helmet shell comes in 3 shell sizes, covering standard head-size variability, and consumer sizes from XS through XXL are available. This helps ensure the shell fits your head shape properly, improving comfort and safety. Alpinestars+2MotoRacingShop.com+2

• The interior liner, cheek pads, and top pad are removable/adjustable; cheek pads are interchangeable between shell sizes. SpazCycle+2Rocky Mountain ATV/MC+2

• Extra conveniences: the helmet is “hydration-system ready,” meaning it has channels to integrate hydration tubes — useful for longer off-road/trail rides. Alpinestars+1

• Also designed to optionally accommodate communication/electronics systems (cut-outs for intercom/speaker systems), which can be handy if you run a comms setup while riding. SpazCycle+1

⚖️ Size & Weight

• For a Medium size, weight is ~1280 g (ECE version) and ~1340 g (DOT version) — relatively lightweight compared to many helmets with similar protection and features. MX Rider+1

• Available in full range of standard sizes: XS, S, M, L, XL, XXL — thanks to shell-size variations + interchangeable padding, riders with different head shapes/sizes can get a proper fit.