A:Answer The specification is to 164' including pool, lake or ocean. After use rinse and dry before putting it back on your wrist. A lot of this guidance is for the band.
From Fitbit:
Do NOT use hand soap, body soap, dish soap, hand sanitizers, cleaning wipes or household cleaners, which could get trapped beneath the band and irritate skin.
To remove build-up of lotions and oils (such as sunscreen, insect repellent and moisturizers) that can be trapped beneath the band, we recommend that you use a soap-free cleanser like Cetaphil Gentle Skin Cleanser or Aquanil, rinse thoroughly and dry well.