If you don't mind looking a little too into triathlons, then you can fly down the road with this aero helmet from LAS.

LAS Crono - MSRP $234.00

The long tear drop shaped aero helmet features a one-size fits all adjustability system. Aerodynamically tested and approved by many teams in the Pro Tour the Crono helmet is a great choice for the most demanding Triathlete.

DESIGN: Long tear drop shaped tail gives maximum aerodynamic advantage

ADJUSTMENT: Single sizeable from 54cm to 61cm

VENTILATION: Innovative internal ventilation system thanks to the ventilation the internal shell.

INTERIOR: Inside padding made of removable and washable COOLMAX

WEIGHT: 400 grams