Altra Lone Peak 9 - Women's Size:L06.0 Fully seam-sealed waterproof shell with

Fully seam-sealed waterproof shell with breathable H2No® Performance Standard protection and a durable water repellent (DWR) finish

it can be kept warm in your pocket to save battery life

There is also a built-in temperature sensor that regulates the heat for optimal performance

StrataCore™ Construction: Yielding an impressive warmth-to-weight ratio

Altra Lone Peak 9 - Women's Size:L06.0 Fully seam-sealed waterproof shell withTake on legendary adventures in a shoe designed to keep up. Altra reengineered the upper for more durability, improved the midsole, and updated the outsole for more grip. A revised midsole foam is lighter weight and designed to deliver a comfortable connection to the ground. No sew overlays and a 100% recycled ripstop mesh upper are made for high mileage durability while an improved outsole offers sticky underfoot grip. Get that classic Altra feel