This study evaluates the performance of new technology "CRYOTHERAPY MAINS ET DECOLLETE" against a classic cryotherapy "Nitrogen Liquid " to treat solar lentigines.

The hands and the neckline will be randomised, either left or right side and treated by two cryotherapy devices:

1. CRYOTHERAPY MAINS ET DECOLLETE is the device under evaluation.
2. Liquid nitrogen is a comparator device.

Inclusion Criteria:

• Phototype II to IV
• Presenting solar lentigos on both hands and neck, diameter ≤ 6mm
• Accepting not to expose the body to sunlight or artificial UV rays during the study
• Affiliate to a health insurance plan
• Having undergone a general clinical examination attesting to his / her ability to participate in the study
• Having given written consent

Exclusion Criteria:

• Having carried out aesthetic care (exfoliants, scrubs or self-tanning, manicure, hand care, UV ...) in the month before the start of the study, at the level of the hands and/or neckline.
• Having applied a depigmenting product in the month preceding the start of the study, at the level of the hands and/or neckline.
• Having carried out aesthetic care at a dermatologist (laser, IPL, peeling, depigmenting creams, cryotherapy ...), at the level of the hands and/or neckline, during the last six months
• Dermatosis, autoimmune disease (vitiligo), systemic, chronic or acute disease, or any other disease that may interfere with the treatment or influence the results of the study (people with diabetes, circulatory problems, cold allergies, With Raynaud's syndrome ...)
• Receiving general or local treatment (corticosteroids ...) likely to interfere with the evaluation of the studied parameters.
• Participating in another study or being in an exclusion period from a previous study
• Being incapable of following the requirements of the protocol
• Person protected by law
• Unable to read and write French
• Pregnant woman or woman wishing to be pregnant during the study, or during breastfeeding period
• Women of childbearing age who do not have contraception