Adjustable Mobile Phone Chest Mount Harness Strap Holder Universal Chest Body Harness Phone Clip Holder For Cellphones - Holders & Stands - AliExpress
GO belt - Mavebælte og telefonholder til løb - Køb her
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Designo Use Your Mobile Phone as Action Camera Body Chest Mount Harness Strap Holder, Also Using As Running Belt Or Armband For Hands Free Workout (Samsung iPhone Etc): Amazon.co.uk: Electronics & Photo