This Alpinestars SMX-S Waterproof Boots review examines a microfibre design with a waterproof membrane, shin plate and replaceable toe slider. The side opening, elastic-mounted zip and wide upper flap are useful details for riders assessing entry and adjustment alongside the sports styling.
This is a specification-based buying guide, not a hands-on road test. We may earn a commission from purchases through our links, at no extra cost to you.
Side entry and a replaceable toe slider
The medial zip sits on an elastic mounting and works with a broad hook-and-loop closure. Open both fully when putting the boot on, then assess whether the fastening holds evenly around the ankle and calf. The textile lining includes a suede heel area, but heel retention still depends on the fit of the complete boot rather than the lining material alone.
An external lateral support and dual-density ankle protectors sit beneath and around the upper. The toe slider uses a no-screw replacement arrangement; confirm the correct SMX-S part and instructions when maintenance is needed. The TPU shift pad, internal toe box and removable footbed are worth checking against your gear lever and footrests. Its waterproof membrane describes the weather barrier, while the microfibre upper and protective structure determine how the boot moves on your foot. Try that movement before selecting a size.
Protection and construction
The specification lists protection at the shin, ankle and toe sliders. Check that these areas sit correctly when you adopt your riding position.
See our motorcycle boot reviews for more buying guides.
Related reading: Alpinestars Stella SMX Plus V2 Boots Review.