5 oz. cotton canvas with cork base;Cork is an Eco-responsible material sourced from the bark of Cork Oak trees After the cork is harvested from the tree bark it regenerates The tree not only continues to live after the cork is harvested, it can be harvested approx every 9-12 years, throughout its life which can be anywhere from 150 to 300 years; Hand wash only; Recommended weight tolerance: 11 lbs; Product Size: 14" w x 18" h;