509 Sinister X7 Fuzion Flow Lens YCRF_bag the flannel material is bonded

the flannel material is bonded to a Polartec® Windbloc® membrane

Force air intakes in the frame promote increased airflow to ensure fog-free vision

Far safer than using in-ear headphones

and removable features like a breath box

Naturally soft

509 Sinister X7 Fuzion Flow Lens YCRF_bag the flannel material is bondedCompatible with all Sinister X7 goggles, the 509 Sinister X7 Fuzion Flow Lens has a super anti fog coating, vents built into the lens, and allows for quick and easy lens swaps depending on light and snow conditions, letting you see more clearly. FEATURES Fuzion Lens Technology Vents built into the lens itself Compatible with all Sinister X7 Goggles (excluding the Ignite models)