![Fiber-bobbin-1.jpg Fiber-bobbin-1.jpg](https://extreemasoftslings.com/wp-content/uploads/elementor/thumbs/Fiber-bobbin-1-q6ximzqaldm8r8b6xrkgibytggszzm7553arqhci4e.jpg)
Core
The core of every Extreema® round sling is made exclusively of 100% high-performance fibers.
![DSC00197-PHOTOSHOP-scaled-e1678977804314.jpg DSC00197-PHOTOSHOP-scaled-e1678977804314.jpg](https://extreemasoftslings.com/wp-content/uploads/elementor/thumbs/DSC00197-PHOTOSHOP-scaled-e1678977804314-q6ximzqaldm8r8b6xrkgibytggszzm7553arqhci4e.jpg)
Signal Sleeve
Signal sleeves indicate sling damage, allowing safe use of the core with jacket repair or replacement.
![DSC00519-PHOTOSHOP-scaled.jpg DSC00519-PHOTOSHOP-scaled.jpg](https://extreemasoftslings.com/wp-content/uploads/elementor/thumbs/DSC00519-PHOTOSHOP-scaled-1-q6ximzqaldm8r8b6xrkgibytggszzm7553arqhci4e.jpg)
Jacket
A round sling jacket keeps core yarn strands together but does not provide complete protection for the core material.