My son and I found these over grips to an excellent solution to sweaty hands. We live in a high humidity climate and have found these grips excellent. We play 4-6 times a week and change the grips approximately once a month. Also very economical.
This is the best overgip for palms that sweat a lot. Hand will feel drier and will not loosen grip easily. its like a having a tissue on yourgrip but very durable. My advise is not to overstock because to it tends to be powdery if not used for more than 6 months.