Forum Aura Boot - Women's The Aura of the mountain surrounds you The Aura’s second season in the line is full of new upgrades, including an internal cage, Surlyn heel counter, and a new heat moldable liner. The Forum Aura is a great boot for ladies who are on a budget, but don't want to compromise style. Features: Liner: Concentrix Level 1 Internal Cuff: Level 1 Tongue: 3-Layered Tongue Midsole: Cupsole Lacing System: Traditional OUTSOLE: New high traction cupsole BACKSTAY: Surlyn® internal backstay for better shell integrity.