Very Poor, I purchased a small and medium pair of these glove liners for a week skiing holiday, by the end of the week there was not much left of them! The stitching went on the first finger on the first day and continued like that, by the end of the week there were two completely open fingers on one hand and one with a ripped thumb on the other. The medium pair fared slightly better with only one finger failing. Also both pairs became heavily bobbled.
I would not recommend purchasing as liners for any kind of active sport as they are not durable enough.
That said, the seller has offered a full refund for both pairs of gloves claiming that this has not happened before... I will update this review to confirm when I have recieved the refund.