Swix Endure Split Mittens - The Swix Endure Split Mittens are an updated version of the split mitten that has over time become a favorite for cold training days. It offers soft and warm 200g PrimaLoft® insulation on the back of the hand and 60g PrimaLoft® Gold Insulation Eco with grip control in the palm. Robust model with water-repellent coated back of the hand and conductive synthetic leather palm.