La Sportiva Thermal Insoles Black 42. Purchase the same size as your G-Summit. These insoles are NOT designed to be used with other Mountaineering Boot category products. Specifications for La Sportiva Thermal Insoles: Manufacturer: La Sportiva Gender: Unisex Age Group: Adults Men's Shoe Width: Medium Color: Black Footwear Type: Insoles Application: Climbing Package Contents: La Sportiva Thermal Insoles La Sportiva 79I-999999-42: Thermal Insoles Black 42