I have had these sheets for 2 1/2 years now.  I CANNOT SLEEP WITHOUT THEM!!! I am a walking hot box and these solve the problem of sweating for me.  I will strongly recommend the vertex mattress protector and a cool pillow.  I have the solar myself.  This sleep system is friggin amazing!!!!  Love going to bed at night because i don’t burn up now!!!!  Strongly recommend!!!!