1: 1. Color variation 2. Presence of logo 3. Size difference

2: 1. Adjustable strap 2. Material texture 3. Stitching pattern

3: 1. Brim width 2. Interior lining 3. Hat shape

4: 1. Embellishments 2. Hat angle 3. Sizing label

5: 1. Hat label location 2. Reflective elements 3. Design pattern

6: 1. Hat seam details 2. Ventilation holes 3. Hat band style

7: 1. Moisture-wicking feature 2. UV protection 3. Embroidery details

8: 1. Hat tag location 2. Brim curvature 3. Packaging presentation

9: 1. Hat crown height 2. Hat print alignment 3. Durability testing label