The Bone Car Wash Sponge is a great microfibre sponge that will gently clean exterior surfaces without scratching.
The Bone is a thick foam pad covered in fluffy, soft microfibre strands. The microfibre strands gently scrub the surface of your vehicle to remove contaminants, but they will never scratch. The pile is deep enough to allow loose grit to migrate into the fibres rather than be dragged across the paint surface. Since the fibres are open-ended instead of looped, they release gritty particles into the rinse water rather than holding them within the loops.
The inner foam pad is bone-shaped for an easy grip, even with wet hands. The overall dimensions of The Bone are 225mm x 125mm. The dense foam pad holds an abundance of soapy water so the paint surface is well-lubricated as you wash.