The Hydro Sport & ST Vented Boots share similar features. Both boots are built based on the Alpinestars S-MX 5 boots; at the clamoring of touring riders, Alpinestars streamlined the old design and removed the external hard parts that were bulking them up. Both boots are an external leather construction with PU impact reinforcements: a PU shin plate, an internal toe counter and shift pad, and an external PU heel counter. They have dual density ankle cups, a PU ankle slider and a shank in the sole for added protection. The difference? The Hydro Sport boots are completely waterproof breathable via the Drystar membrane while the ST Vented boots are perforated for warm weather riding. These are both very versatile touring boots.
Next, there is the updated and redesigned Alpinestars Ridge Boots and the hot-off-the-press Alpinestars Roam Boots.
Be sure to check out all the Fall 2010 Alpinestars gear at RevZilla.com. To see other boots that compete with these, visit our Touring Boots page.