The DeHy Basic kit is available in 2 versions:

Cons: The extra protection means that they are not as well ventilated as some other options out there

and DBAIR CS

Allows switching crank arms between bikes

Convertibility: These can convert to Boost QRx141 but only with adaptors (sold separately)

TLD Flowline SE MIPS Helmet - XS-S - Radian Orange-Dark Grey Back in Stock The DeHy Basic kit isDETAILS Be sure to stay safe on your bike rides with the Flowline SE Helmet from Troy Lee Designs. This half shell helmet seamlessly combines safety, comfort and style. Enjoy reliable impact absorption and a breathable airflow system with the helmet's design. Plus, the easy to use magnetic buckle ensures a secure closure every time. Conquer the mountain bike trails, or city streets, with the Troy Lee Designs Flowline SE Helmet. SPECIFICATIONS 3 Way