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A metal case (sold separately) is required to use this band with your Amazfit Helio Strap or Helio Ring Core. The Arm Band Made from durable nylon - available in Black Designed for comfortable all-day wear on the upper arm or bicep Adjustable - total band length: 45cm Looking for a wrist version? A Wrist Band is also available here Shipping Shipping cost: 6 EUR worldwide Free shipping on orders over 60 EUR All orders are shipped directly from our warehouse with tracking included on every order. USA: 8-12 business days Europe: 7-10 business days Rest of the world: 8-12 business days Size Guide The arm band fits arm circumferences from 24cm to 42cm. One Size 24cm - 42cm If your arm circumference is under 24cm, we recommend using the Wrist Band in M/L size instead for a better fit. Built in Public, Driven by Community The Strap Forge started with a simple observation: the Amazfit Helio Strap is a great device, but its design is not exactly fashion-friendly. We set out to change that. See where it all started: Read the original Reddit post that launched the project. Feel free to reach out to me directly on Reddit (u/Tomtomtxz2) if you have any questions - I always reply. October 2025 The idea is born. First 3D-printed PLA prototype shared on Reddit. The community responds instantly - there is real demand for a premium Helio Strap. November 2025 The metal quest begins. Lost wax casting fails on tolerances. Electroplating peels off with sweat. CNC aluminum emerges as the only viable path for a truly premium product. December 2025 200+ survey responses. The community speaks. Production is greenlit. The CNC aluminum adapter goes live on the store with Gold, Silver and Black finishes. January 2026 First bulk order ships. Every single case is checked by hand. CNC buckles replace the standard ones because the quality was not good enough. No compromises. March 2026 Major operational shift. Warehouse model goes live. Shipping drops to 6 EUR worldwide with tracking on every order. Arm band version and Sandy White color on the way. This product would not exist without the Reddit community. Every iteration, every improvement came from real feedback. Want the full story? Read our complete development log: Build Log Follow the journey on YouTube and Reddit.