Tencel® Is One Of Our Favorite Eco-friendly Materials For So Many Reasons. First, It's Made From Eucalyptus Wood Pulp And Processed In A Closed-loop System That Recycles And Recovers 99% Of The Solvents (which Are Non-toxic, To Boot). It's Also Super Soft With Great Stretch, And Has Natural Antimicrobial Properties (meaning Less Stank!). Thanks, Nature.