Works great if you are wearing a CPAP. Not so well if wearing it by itself.

A CPAP mask keeps the cap from sliding down, but if you are wearing it by itself it turns into a blindfold during the night because the chinstrap pulls it down and forward over your face. A pro is it is made of cotton so it breaths and won't smell like an old gym sock in the morning. A con is it is expensive compared to other products.

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