This Alpinestars SP-X BOA Drystar Boots review focuses on the waterproof sport-touring version with side entry and dial adjustment. Microfibre, knitted mesh and TPU reinforcement combine with a supported sole, making closure tension and movement useful points to assess.
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.
Alpinestars confirms this dedicated waterproof version: Alpinestars SP-X BOA Drystar specification.
Side-entry BOA fastening and Drystar lining
The BOA Speed Lace system secures the lateral entry. Practise tightening and releasing it while stationary, then check that the closure holds the heel without concentrating pressure over the instep. This Drystar version has a dedicated waterproof and breathable liner; confirm the exact listing when comparing it with the separately named standard SP-X BOA.
The upper combines microfibre and knitted mesh with TPU in protective areas. Ankle and heel components, a shift pad and toe sliders provide the main equipment to assess around the foot. Check where they sit when your knee is bent and whether the boot clears your gear lever comfortably. The rubber sole includes a support shank, with a flexible internal structure intended to accommodate walking. Try both an indoor walk and the motorcycle controls with your normal socks before choosing a size. A compact sport-touring shape still needs secure retention and appropriate trouser overlap.
Protection and construction
The specification lists protection at the heel, ankle and shin. 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.