SW000613 Main Body: 100% Goat Leather. Back: 93% Nylon, 7% Elastane. Finger Tip: 100% Polyester, Polyrethane Coating. Lining: 70% Wool, 30% Nylon. EOD. Contains non-textile parts of animal origin. Smartwool already makes some pretty intelligent pieces of gear, but only the really clever pieces are given doctorates. When it comes to the SmartWool PhD Spring GLoleve, brains definitely win over brawn. The nyLolen and leather shell protect against that wet mashed potatoes you're sliding around in while still being dexterous enough for pole plants and pesky zippers. Wool basically wrote the original thesis on wicking, so you know that lining will keep your hands from overheating in the sunshine, naturally warding off odor in the process.