Leidowei Men's 2 in 1 Workout Running Shorts Lightweight Training Yoga Gym 7" Short with Zipper Pockets

Underwear? Yes or no while wearing them?

Is this good at wicking away sweat?

I see that in addition to "Leidowei" selling 19.96, these men's shorts are also sold by another seller at a cheaper price. Is their quality the same?

Would these be considered 5” or 7” shorts?