GoPro Floaty Backdoor (HERO8 Black) – Official GoPro Accessory

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Amazon.com Price: $19.99 $13.99 (as of 19/02/2020 23:42 PST- Details) & FREE Shipping.

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Easy-to-spot accessory attaches directly to the included backdoors to keep your GoPro afloat
Great for snorkeling, surfing, wakeboarding or other water activities