【Compatible Models】The 20mm silicone watch strap for Fenix 5S/Fenix 5S Plus/Fenix 6S/Fenix 6S Pro/D2 Delta S Smartwatch. [Premium Silicone Materials] Engineered with upgraded soft silicone, the 20mm silicone sport band boasts triple the softness of conventional rubber materials. Designed to withstand water, sweat, and tearing while remaining odorless and fade-resistant, it delivers 24/7 comfort for sensitive skin types. [Secure Fit] Featuring 316L stainless steel buckle and a dual-ring buckle with an inner bulge that locks into strap holes for anti-slip stability. The sturdy metal adapter and dual keepers provide dual security, keeping the band firmly attached during intense workouts, swimming, or outdoor adventures—so you never worry about your watch slipping off. [Flexible & Adjustable Size] This silicone watch band design for Fenix 5S accommodates 6.3 inches-8.14 inches (160mm-207mm) wrists. Please measure your wrist and make sure the size before you purchase. [Exceptional Customer Support] Thank you for selecting our replacement for D2 Delta S watch bands. If you have inquiries about compatibility with the bands or require assistance, please contact our dedicated support team, and we offer a prompt response within 24 hours to resolve your issue.