5th Element ST-1 Snowboard Boots Performance Boots for Performance Riding - The ST-1 boots are designed for boarders with an intermediate to advanced skill level who want to ride the whole mountain. Rider-Friendly Flex - A softer boot flex is more forgiving and less rigid than stiff boots. Custom Comfort - The boot's synthetic shell offers great support to your feet, and it comes with a Comfort EVA Liner that is removable. Find Your Fit - Traditional laces are used to help fine tune your fit for optimal riding all day long. Go-Anywhere Type Boots - The ST-1s are favorite for park riders due to their soft flex, but are great for riding groomed slopes as well.