The short answer for this wrinkled giant
A Neapolitan Mastiff does not need regular haircuts at all. The coat is short, straight, and dense, lying close over a very large, loose-skinned body, and there is no long hair to shape, thin, or keep off the floor. Cutting it would not reduce shedding and would leave the skin less protected. For this breed, grooming is about loose hair, skin folds, and drool management, not scissors.
What the coat actually does
Despite looking low-maintenance, a Neapolitan sheds steadily and more heavily when seasons change. That short hair works its way into bedding and clothing, and the skin underneath produces plenty of natural oil. The deep wrinkles on the head, neck, and shoulders are the bigger concern. Moisture, drool, and food collect inside those folds during the day, and if the folds stay damp, the skin there becomes sore and smelly. A haircut does nothing for any of that, which is why owners who expect a clipped, tidy finish are solving the wrong problem for this breed.
A brushing routine that fits the Mastiff
Brush once a week with a firm bristle brush or a rubber grooming mitt, working in the direction the hair grows and covering the broad back, sides, and hindquarters where loose hair gathers most. The mitt often works best because you can feel lumps, ticks, and sore patches in the folds as you go. Follow brushing with a fold check: lift each major facial fold gently, wipe inside with a soft, slightly damp cloth, then pat completely dry with a second cloth. Never leave a fold damp. Bathe only when the dog is genuinely dirty or smelly, using lukewarm water and a mild dog shampoo worked carefully around the folds, then dry the folds again afterward. Nails on a dog this heavy wear unevenly, so check them during the same session and trim the tips if they click loudly on hard floors.
Mistakes to avoid with this breed
Do not shave or clip the coat short in summer hoping for less shedding or a cooler dog. The short coat already allows heat to escape, and shaving exposes pale skin in the folds to sun and irritation while the shed hair still falls, just shorter. Do not use scented wipes deep inside the wrinkles every day either, since repeated scented products can irritate skin that is already warm and folded. Skip the groomer appointments booked for a cut, and instead spend that time on a thorough bath and fold dry when the dog needs one. If a fold stays red, develops a strong sour smell that cleaning does not clear, or the dog starts pawing at its face, have your veterinarian look at the skin rather than adding more home products.
Keeping a big, messy routine shared
Between the weekly hair, the daily drool cloths, and the fold drying, this breed creates more small jobs than most. Recording who brushed, who checked the folds, and when the last bath happened prevents the same person doing everything while others assume it was done. That shared log is where KinsLe Care Teams helps a Neapolitan household, letting each grooming job be assigned and timestamped when it is finished so the folds and coat both stay on schedule.