DECATHLON's fitness brand offers useful suggestions for your practice.
Choosing a yoga mat is pretty straight-forward. Basically, you should think about the top and bottom of the mat, or, the comfort and grip.
Gentle yoga styles, such as hatha, yin, restorative or prenatal, which tend to focus on slower postures and being in contact with the floor will be easier with a thicker, more comfortable mat. Think 5-8mm to help protect your joints and encourage you to stick with longer sessions.
That’s not to say there aren’t specific requirements for dynamic yoga mats – if you’re doing ashtanga or vinyasa or are practicing in a warm room (Bikram/hot yoga) where you do lots of standing poses and balancing, your top priority is stability. So, you’ll need a mat that provides plenty of grip and stops you slipping. i.e. a thinner mat, between 1 and 5mm. You can also add a thin pure rubber mat for maximum grip, which you’ll find especially helpful for asanas like downward-facing dog.
If you do yoga away from home, opt for a mat that is easy to carry. Look out for mats with carry straps or invest in a yoga mat bag.
When doing yoga barefoot, it's best to have your own mat and to clean it regularly with water, which you can add a few drops of essential oils to for extra zen points.