In black 600d material all double stitched for durability Easy-clean fabric Top pocket clear PVC slip pouch Inside lined with foilene for heat retention Temperature holds for up to half an hour Fits most delivery bike boxes Two carry handles designed to balance out the weight when its been carried The denier of the fabric. A denier is how thick each individual strand of material weighs (actually the gram weight per 9000 meters). The higher the density the stronger and thicker the fabric
