Complex sentence: Two-piece/Euro clubs are the most popular juggling clubs, as they don't hurt when you (accidentally) hit yourself with one and because of their weight can withstand moderate winds, unlike the one-piece club.
Split into simpler sentences: Two-piece/Euro clubs are the most popular juggling clubs, as they don't hurt when the juggler is hit. Because of their weight they can withstand moderate winds, unlike the one-piece club.