I borrowed a friend’s ski helmet and lost it at the resort. I have no idea what brand it was. It was several years old but knowing her it was probably high quality. I’d like to send her a couple of options to choose from or maybe give her a voucher to an online ski shop. At a glance it looks like helmets run from £50 - £175. How much should I spend? I want to err on the side of being generous but I don’t know what makes a good helmet. Are there any good brands or shops I should check out?