--- product_id: 765528708 title: "5.0/MG SportFlex – Waterproof, Sweatproof Accessory" brand: "whoop" price: "¥20480" currency: JPY in_stock: true reviews_count: 13 url: https://www.desertcart.jp/products/765528708-5-0-mg-sportflex-waterproof-sweatproof-accessory store_origin: JP region: Japan --- # adjustable breathable fit 100% waterproof durability sweatproof & dirtproof resilience 5.0/MG SportFlex – Waterproof, Sweatproof Accessory **Brand:** whoop **Price:** ¥20480 **Availability:** ✅ In Stock ## Summary > 💪 Elevate your hustle with SportFlex – where durability meets dynamic style. ## Quick Answers - **What is this?** 5.0/MG SportFlex – Waterproof, Sweatproof Accessory by whoop - **How much does it cost?** ¥20480 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/765528708-5-0-mg-sportflex-waterproof-sweatproof-accessory) ## Best For - whoop enthusiasts ## Why This Product - Trusted whoop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Band Swaps:** Fast Link slider lets you switch bands effortlessly—style and function in one sleek package. - • **ECG-Ready Innovation:** Compatible with WHOOP Life membership for on-demand ECG readings—stay ahead of your health game. - • **Silky Smooth Comfort:** Soft-touch silicone that's hygienic, ultra-smooth, and easy to clean—keeps you fresh no matter the grind. - • **Unstoppable Performance:** Waterproof, sweatproof, and dirtproof silicone built for your toughest workouts and wildest adventures. - • **Custom Fit, Maximum Breathability:** Adjustable closure with ventilation details ensures a snug, breathable fit that moves with you. ## Overview SportFlex is a premium, waterproof, sweatproof, and dirtproof silicone wristband designed for high-performance athletes and active professionals. Featuring an adjustable, breathable fit and easy band swapping, it’s compatible with WHOOP devices and offers optional ECG functionality with a WHOOP Life membership. ## Description Made with soft-touch silicone, SportFlex is waterproof, sweatproof, and dirtproof—built to take on high performance and water activities. Includes a Band, Hook, Clasp, and a Fast Link slider that makes swapping bands easier than ever. Compatible with WHOOP One, WHOOP Peak, and WHOOP Life—membership not included. ## Features - BUILT FOR HIGH PERFORMANCE – SportFlex is designed with waterproof, sweatproof, and dirtproof silicone. It’s highly durable and designed to withstand your most intense workouts and adventures. - MADE WITH SOFT-TOUCH SILICONE – SportFlex is ultra-smooth, hygienic, and easy to clean. Small scuffs can be wiped off, or you can deep-clean the band with isopropyl alcohol and a lint-free cloth followed by a water rinse. - ADJUSTABLE AND BREATHABLE – SportFlex is made with an adjustable closure system to ensure a snug, secure fit—no matter how intense your workout. The band includes ventilation details, making it extra breathable and comfortable. - 100% WATERPROOF – SportFlex is completely waterproof, making it an essential accessory for everything from swimming laps and surfing to high-sweat, high-intensity workouts. - OPTION FOR ECG COMPATIBILITY – With a WHOOP Life membership, choose a SportFlex band to take on-demand ECG readings.* ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0DZFGVQG4 | | Best Sellers Rank | 7 in Arm & Wristband Technology Replacement Bands | | Date First Available | 6 Mar. 2025 | | Manufacturer | WHOOP | ## Images ![5.0/MG SportFlex – Waterproof, Sweatproof Accessory - Image 1](https://m.media-amazon.com/images/I/519QTDFwyIL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good strap *by on Reviewed in the United Kingdom 3 April 2026* Good quality and happy with purchase ### ⭐⭐⭐⭐⭐ Perfect strap for exercise *by on Reviewed in the United Kingdom 30 August 2025* So much better than the standard strap that comes with the whoop I was fed up with the smell from getting the old strap wet from exercise and showers this strap fits perfect feels nice and drys in minutes battery fits no problems perfect ### ⭐⭐⭐⭐⭐ Great product *by on Reviewed in the United Kingdom 24 September 2025* ordered blue, great vibrant colour and so much better for working out than the standard band. Expensive but good quality. ## Frequently Bought Together - WHOOP 5.0/MG SportFlex – ECG Compatible, Waterproof, Sweatproof, Silicone Accessory for Health & Fitness Wearable - Not Compatible with Gen 4 - WHOOP 5.0/MG SuperKnit – ECG Compatible, Signature Performance Knit – Not Compatible with Gen 4 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/765528708-5-0-mg-sportflex-waterproof-sweatproof-accessory](https://www.desertcart.jp/products/765528708-5-0-mg-sportflex-waterproof-sweatproof-accessory) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-16*