Complex sentence: The popular boat is considered a more rapid alternative to the laser dinghy and has an international racing class devoted to it, in many conditions the 29er is even more challenging to sail than its Olympic big brother, the 49er.
Split into simpler sentences: The popular boat is considered a more rapid alternative to the laser dinghy and has an international racing class devoted to it. In many conditions the 29er is even more challenging to sail than its Olympic big brother, the 49er.