The 44mm clincher is the all purpose carbon wheelset. No matter what type of riding you are doing, the 44mm depth with improved aerodynamic profile will be a great option for you.
It's a great wheel set for climbing, descending, windy conditions, races, and even training. With the mid-depth aero rim height and improved design to handle the crosswinds these can be used even in very windy areas. With the low weight of the wheels they are a great climbing wheel set and on the opposite side of that climb the wider rim profile will make for great handling when flying down a descent.
These wheels can be used with clincher or tubeless, for tubeless you will need rim tape and valves as well as use tubeless clincher tires.