The Sperry Women's Gold Cup Ava Boots are a perfect blend of craftsmanship and performance. Premiumleather uppers are sewn by hand and are lined with luxurious Lambskin. Seasonal style updates feature hand-burnished leathers and unique color combinations. Waterproof protection includes a premium leather shaft and a rubber encapsulated shell. Microfleece lines the inside for a super smooth feel and a touch of warmth. Wave-Siping rubber is the same rubber Sperry uses for boat shoes, so you know the sole can handle grip.