Hi Fiona,
Thank you for your review.
We are so sorry for the delay in receiving your order. Also, the water-proofing material of the cards does make the cards a bit slippery but we wanted to make sure that they are more durable so you can use them for so much longer.
We are happy to hear that you think they're a great idea!!
“Great selection of different exercises to do with my body/booty bands.
Love that I can do a speed round or a more intense workout. Great quality cards.”