Product configuration: Glasses; Cloth bag;*EVA box; Gift Box. Notes: 1. The photochromic lens has the function of UV400, which will change color under direct sunlight 2. Discoloration occurs in about 1 minute in winter and 40 seconds in summer. 3. The speed depends on the sunlight and UV intensity! (If the UV intensity and temperature are low, the discoloration speed will slow .) 4. The discoloration speed is related to the UV intensity and temperature.