ski boots
What Is Boot Sole Length (BSL)? How to Find Yours Before You Buy Skis
We answer this question 10 to 15 times a day in the wintertime. BSL is the one number that stands between a new pair of skis and a mounted, ready-to-ride setup; and almost nobody knows it off the top of their head. Here's what it means, the three places it's stamped on your boot, and what to do if you can't find it.
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