Does exfoliation damage your skin? How does this "file + bristle" double-headed brush achieve gentleness and efficiency?

Bristle brush with file, scientific logic of dual tool synergy
Precise removal of thick calluses with file layer
The file can remove thick calluses on the heels layer by layer, avoiding excessive friction and damage to the dermis at one time. The file acts directly on the stratum corneum through physical friction. Its stepped micro-tooth design can peel off thick calluses layer by layer, avoiding excessive damage to the dermis at one time by traditional scrapers or pumice stones. Experiments show that the dead skin removal rate can reach more than 90% after reasonable use, and the skin micro-injury rate is less than 3%.
Additional effect: Use with warm water foot bath (about 40℃, 5-15 minutes) to soften the cuticle, and the effect is significantly improved.

Gentle polishing and antibacterial of the bristle end
Physical advantages of natural boar bristles: The surface roughness of the polished boar bristles is within a controllable range, which can absorb dead skin debris without scratching the new stratum corneum.
Oil adsorption effect: The natural scale structure of the bristles can absorb sebum and metabolic waste, and can increase the cleaning efficiency by 30% when used with warm water.

Contraindications and precautions
The file layer is not allowed to be used for patients with diabetes or open wounds on the feet. Only the bristle end should be used for gentle cleaning.
After cleaning, the file layer needs to be wiped with 75% alcohol. The bristle end should be soaked in diluted white vinegar for 10 minutes every month to sterilize, and dried vertically to avoid mold growth.