Our D.O.T. And ECE Daytona Viper Helmet, With Inner Anti-Scratch Retractable Smoke Shield, In Hi-Gloss Black, Meets And Exceeds D.O.T. FMVSS 218 And ECE 22R06 Standards. With 2 Different Shell Sizes (XS-M/L-2XL), You're Sure To Get That Proportionate Fit!! Features A Dual Shield System; Outer Anti-Scratch Clear Shield With OptiVision 200 Lens (Anti-Fog) And Inner Anti-Scratch Retractable Smoke Shield. Also Has A Quick Release Lock Retention System; One Finger Release Lever For Easy Detachment, Passive Chin And Forehead Ventilation, And A Removable, Hand Washable Interior (Moisture Wicking Fabric). Bluetooth Compatible. Cloth Draw String Bag Included. Sizes Range From XS-2XL.. Details. Meets And Exceeds D.O.T. FMVSS 218 And ECE 22R06 Standards.. With 2 Different Shell Sizes (XS-M/L-2XL), You're Sure To Get That Proportionate Fit!!. Inner Anti-Scratch, Retractable Smoke Shield.. Outer Anti-Scratch Clear Shield With OptiVision 200 Lens (Anti-Fog). (Optional Outer Replacements/Colors Available, Click Here).. Nylon Strap Retention System With Quick Release Lock.. Quick Release Lock With One Finger Release Lever For Easy Detachment.. Passive Chin And Forehead Ventilation.. Emergency Quick Release Cheek Pads.. Moisture Wicking Fabric Keeps Your Head Cooler And More Comfortable.. Removable, Hand Washable Interior.. Dual-Density EPS Liner.. Eyeglass Compatible.. Intermediate Oval Head Shape.. Fiberglass Shell.. Clear Lacquer Finish.. Bluetooth Compatible.. Bluetooth Installation/Pairing.. ALSO INCLUDES. Cloth Draw String Bag.. Dimensions. HELMET SIZE. CM. IN. HAT SIZE (IN). XS. 53-54. 20 7/8"- 21 1/4". 6 5/8-6 3/4. S. 55-56. 21 5/8"- 22". 6 7/8-7. M. 57-58. 22 1/2"- 22 7/8". 7 1/8-7 1/4. L. 59-60. 23 1/4"- 23 5/8". 7 3/8-7 1/2. XL. 61-62. 24"- 24 3/8". 7 5/8-7 3/4. 2XL. 63-64. 24 3/4"- 25 1/8". 7 7/8-8