Olukai is a proud Certified B Corporation brand dedicated to meeting high standards for sustainability and social responsibility. In Hawaiian, Nana Hele means to take notice, everywhere, and true to their name, you can wear the OluKaiÂ® Nana Hele just about anywhere. Don't be surprised if people start noticing you everywhere you go. A cross between sneaker and slipper boot, these heavy duty boots combine shearling lining in the forefoot, waterproof leather on the outer layer, and a 'Wet Grip Rubber' outsole to create the perfect shoe for keeping warmth in and the weather out. Leather upper. Textile lining. Synthetic outsole. Shearling lining comes from Australian sheep and is dyed in the tanning process. Imported. Measurements: Weight: 13 oz Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.