The 4mm mat is the most popular of the ecoYoga jute mats. A pure rubber underside to grip the floor and fabric/rubber mix on top. The hessian fabric gives a tactile, pleasantly natural surface to work on whilst providing that GRIP so sought after. The 4mm thickness gives enough support and cushioning whilst maintaining a firmness for good practice. The hessian/jute material is specially selected for the ecoYoga mat. The process of application allows for the full characterful nature of this jute material to be expressed; encased in ecoYoga's unique 100% natural rubber blend. Excellent for any style of yoga practice 6ft (183x64cm) 2kgs (4.4lbs) MADE IN THE UK Sustainable/ plant-based materials 100% natural rubber (contains latex) suitable for Vegans Machine washable (though shower better:) biodegradable Excellent Grip / Non-slip Practical Ethical For beginners and experienced students alike