Sure Footing
The Crampons' steel spikes give you better traction in icy terrain. They make rope climbing easier, Sprains less frequent, and Weak Ice more forgiving.
Caused by: Worn [Clothing]
Sure Footing is a positive Affliction obtained when wearing Crampons or Improvised Crampons in the accessories slot. The effect remains in effect as long as the accessory remains equipped. If the player's footwear (shoes and 2 socks slots) are removed (whether by the player or their footwear is ruined) then their Crampons will automatically be removed, removing the affliction.
Sure Footing is a Benefit affliction in The Long Dark. Its effect is positive.
It is caused by worn clothing.
No specific treatment is listed — it resolves on its own or is avoided rather than cured.
Verdict: Overall Sure Footing is a benefit best handled by avoiding its cause.