All PRO Series mats have a closed-cell surface, which will never absorb moisture. Because of this, if you are warm/sweaty at all, the mat will feel slippery, so we always recommend pairing it with one of our hand towels to absorb moisture and provide extra traction or to apply our Yoga Grip Gel during your practice. If you're practicing hot yoga, we recommend a mat towel for full mat coverage. For towel guidance read our Guide to Yoga Towels and check out this blog post for more tips to decrease slip and increase grip.