بطانة سايبورغ

These liners are noticeably warmer than the stock ones that came with my boots, without adding too much bulk. The extra comfort makes a real difference on longer ascents.

Finally, a liner that doesn't sacrifice foot dexterity for warmth—my toes stayed cozy during a long, exposed ridge traverse. The extra padding around the ankle locked my heel in place perfectly without any pressure points.

The heat retention is noticeably better than my old liners, making those cold alpine starts much more bearable. I've been able to stay out longer on the skin track without my feet getting numb.