Tifosi Crit Interchangeable Lens Sunglasses Matte Black Category_Hydration Packs KEY FEATURESLightweight construction minimizes bulkFour KEY FEATURESLightweight construction minimizes bulkFour points of adjustment for an optimal fitTwo leash attachment points: aluminum V ring on back and reinforced webbing loop on chestID pocket stores dog tags and pick up bagsFur and debris resistant linerReflective trim for visibility in low light conditions and light loop for attaching The Beacon™MATERIALSShell: 150 denier polyester ripstop (bluesign® approved)Lining: 75 denier polyester lining with heat embossBuckles: ITW Onyx side release bucklesFront Leash Attachment Point: 87 Bridgedale Stormsock Lightweight Waterproof Ankle Sock in Black Adjustable Nose Pieces Limits Slippage & Increases Comfort and the wrap lenses protect he eyes from harmful UVA UVB rays