The UGG Union Chukka HyperWeave brings high performance materials to a classic ankle boot silhouette. Upper constructed of HyperWeave technology which combines lightweight materials with a perforated design. Lace-up closure to secure foot in place. Sock-like elastic collar hugs the ankle. enerG comfort insole is utilized for its superior cushioning. Flexfit technology ensures stability with each step. Heel loop assist. Outsole contains Treadlite technology for additional traction. Imported. Measurements: Weight: 10 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.