bike helmet with spike customTAYLOR33 Even Spikes Rubber Mohawk Accessory Piece (Helmet Not Included) : Automotive but will fit most heads measuring 50 Stick On Metal Motorcycle Helmet

While both are designed to meet strict safety standards, their designs differ significantly in coverage, ventilation, aerodynamics, and accessories to match the distinct demands of each discipline

1.412" (35.87mm)L x .253" (6.43mm)W

The size system starts with the smallest hooks, size 32, and gets larger as the number decreases

For most of your qualms, it sounds like essentially what you're looking for is an F Stop bag

Waxed canvas body: Durable textured fabric for regular outdoor and everyday use

The system is a bit clunky and it took some finessing to nail the fit, but Velcro adjustments often are even tougher to tailor and most backpackers only adjust sizing once (or perhaps a second time if you lend it to a friend)