Professional mats with a closed-cell structure in particular (such as the Manduka PRO series) may have a protective top layer from the production process. These mats may need a "break-in period" to reach their true grip performance. In contrast, open-cell mats with a polyurethane surface, like Liforme, deliver maximum grip from the first use. Depending on your mat type, you'll notice its grip increase the more you use it.