ansi approved bike helmet Frontier Type 2 Class E (Non-Vented) – point suspension with ratchet knob fits 20.87 to 25.2 in./53 to 64 cm Bike Helmet, Adult, Head Size

(Theres also a Sport option made with an ultra-light ripstop nylon.) Each type comes in two sizeslarge (10.5 liters) and small (3.9 liters)

if you do it the way Cinto did it, it might be the easiest

New Dual Tear-Drop Top XGF Intake Vents Drawn initially from Arais F1 helmet, the XGF tear-drops maintain the airflow of the previous design with a compact, light and unobtrusive form that complements the round and smooth shell

You also have enough sensitivity to protect light tippets and fish small chironomids, while still having the backbone to handle bigger trout and heavier flies when conditions call for it

Bontrager H2 Comp, wire bead, 30 tpi, 700x35mm

It features a shockcord at the waist to customize the fit and it comes in two colours