Obstructive sleep apnea has unique particularities in women, whose upper airway, breathing patterns, and fat distribution are different from men. However, as most CPAP studies have focused on men, there is not enough research to say with certainty whether women have unique treatment needs . Several studies show that women do derive benefits from CPAP therapy, which suggests that the existing masks are working. Women are more likely to experience claustrophobia, in which case they may prefer more streamlined and minimalist mask designs.