G2 SM Liner

$131.34 ~~$199~~ In stock

A replacement liner for the G2 SM mountaineering boot. This liner provides insulation and warmth and has a heat-moldable upper.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Zoe ★★★★★ Oct 21, 2026

First time swapping the stock liner out and the difference in ankle hold is immediate, the heat-moldable upper really locks down without any pressure points. After a full day on the skin track my feet stayed toasty and dry, which is all I ask for in a boot liner.

Stella ★★★★★ Oct 20, 2026

The heat-moldable upper molded perfectly to my instep after one session, and the insulation kept my feet comfortable even on a subzero morning. They've made a huge difference in my boot's overall feel.

Riley C. ★★★★★ Oct 19, 2026

I was worried about cold toes on long tours, but the insulation in this liner really locks in the heat. The moldable upper wrapped my ankle perfectly after just one oven session. Exactly what my old boots needed to feel like new again.