GoPro - Head Strap 2.0 Options:Head Strap 2.0 - (ACHOM-002) this is just the replacement

this is just the replacement RSA Rubber Mount)

but installing progressive springs will also give your 310 a significant improvement in handling and braking

Ultra-wide 50 mm strap with thick silicone and two backing silicone stripe to offer a secure fit to your helmet

Factory Activated CT4L-BS

GoPro - Head Strap 2.0 Options:Head Strap 2.0 - (ACHOM-002) this is just the replacementHead Strap 2. 0 has a modular design that can be configured into three different setups. Use the headband with the top strap for more support and stability during intense activities, or the headband on its own for a low profile setup during lower intensity activities. The removable clip attaches your GoPro to caps, belts and more, while the main headband can strap your GoPro to stationary objects for added versatility. Includes head strap, top strap,