Alpinestars SP-X Boa Drystar Boot :: MotorcycleGear.com

Alpinestars SP-X Boa Drystar Boot

The SP-X Boa Drystar Boots are crafted with an ergonomically optimized touring design to provide superior comfort during long rides. The waterproof and breathable Drystar® membrane ensures outstanding wet-weather protection, while the rugged, grippy sole is designed for reliable performance in all conditions, both on and off the bike.

  • Main upper constructed with a combination of advanced microfiber, knitted mesh and co-injected TPU with Lycra for the optimum blend of comfort, breathability and performance
  • Lateral side entry system incorporates BOA Speed Lace System technology for a quick, precise, and secure closure
  • Equipped with a Drystar® liner for proven all-weather performance, remaining waterproof while still being highly breathable
  • Rubber sole utilizes a special compound that provides textured grip and excellent absorption, and features an integrated support shank for an enhanced sole rigidity
  • Sports sole design incorporates a high flex inner structure (lasting insole) for superior walking comfort
  • TPU sliders are strategically positioned on the lateral toe-box and on the lateral calf for optimum flexion and protection
  • Internal shin reinforcement layered under the upper for impact protection in a critical area
  • CE certified to EN 13634:2017

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Sizing Information

The overall fit/size of this new style seems “true” to their published size chart (see below), so if you are comfortable with a certain size from previous boots, then choose the same size. I’d consider the width of the men’s sizes to be normal to slightly wide (D or E).

Euro Men’s US Women’s US
36 3.5 5
37 4 6
38 5 7
39 6 8
40 6.5 8.5
41 7.5 9
42 8 10
43 9 11
44 9.5 11.5
45 10.5 -
46 11.5 -
47 12 -
48 12.5 -
49 13.5 -
50 14.5 -

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