Australian Designed and tested. Run-Flat - If the unlikely happens you can still ride home with the STAR Run Flat and Rim Protection Design. Increased Tyre Stability - Additional support to all of the tyre carcass resulting in less tyre flex. Increased Comfort - Absorbs vibrations for a smoother ride, dissipates impact forces away from the rim with our Rim Protection feature. Material being Close-Cell Foam EVA with Micro-Air-Suspension obtaining enhanced Compression & Rebound characteristic. Increased Grip - Run at lower PSI for more confidence to push the limits due to a larger footprint. Air adjustable to get that perfect tire grip your always wanted. Insert Grooving Channels – With many grooving channels allowing the Tubless tyre sealant to flow. Super Durable, Long Life, Easy Installation – Our Inserts are super durable and will last years to come. Easy Installation – Quick to install and maintenance free (view our fitting Video's). https://www.outdoorprimal.com.au/duramoussestar/mtb-star-digital-insert-guide Made for Tubeless and Tubeless-ready rims / tyre's that requires sealant. You will need to already have sourced your French valve (with side entry base) & tyre sealant ready to now install our DuraMousse STAR insert.