Treds are the only heavy-duty overboots in the world made of latex natural rubber. Stretchy latex natural rubber offers a smooth, drag-free inside surface for easier pull on/pull off action. Snug and comfortable. Superior traction with the specailly designed "Block" sole pattern. Quick clean up. After the job, wash Treds off inside and out. More economical than PVC boots. Patchable. If Treds get punctured or snagged, the tear will not run. Just turn the boot inside out and apply a standard rubber patch.