S1 Lifer Liners are the same great quality pads already fitted in your S1 Helmet, but are completely interchangeable!
Feel like the back of your helmet is too loose but the front is just right? Slip in a larger size on the rear, keep the front the same, BAM! Custom fit helmet without the price tag . Or has your head grown and you don't want to buy a new helmet yet? Just swap the pads out and make it feel like new!
Each colour is a different size, so even if you can't remember what size you have, just check the colour and choose from the list as you need.