Utility Sling「ストラップ単体」

The product you mentioned, "Topologie Utility Sling" (ストラップ単体), appears to be an accessory or component of a bag or utility sling from the brand Topologie. Topologie is known for its minimalist design and functional outdoor and travel gear.
The "utility sling" typically refers to a small, crossbody bag designed for convenience and hands-free carrying. The term "ストラップ単体" translates to "strap only," indicating that this is likely a replacement strap or a standalone strap that can be used for various purposes.
If you're looking for specific information such as product specifications, where to buy, or customer reviews, I would recommend visiting the official Topologie website or checking retailers that carry this brand.