The Undefeated x Air Max 90 ‘Black Optic Yellow’, along with other variations, was released in December 2019 as part of a partnership between Nike and the well-known West-Coast streetwear retailer. James Bond and Eddie Cruz, co-founders of Nike, have previously contributed to a variety of Nike designs. They developed four white and four black versions of the legendary running sneaker designed by Tinker Hatfield with unique colour themes and UNDFTD branding for this premium collection.
| US MAN | UK | EU | CM | WM | GS |
|---|---|---|---|---|---|
|
3.5
|
2.5
|
35.5
|
22
|
5W
|
3.5Y
|
|
4
|
3
|
36
|
22.5
|
5.5W
|
4Y
|
|
4.5
|
3.5
|
36.5
|
23
|
6W
|
4.5Y
|
|
5
|
4
|
37.5
|
23.5
|
6.5W
|
5Y
|
|
5.5
|
4.5
|
38
|
24
|
7W
|
5.5Y
|
|
6
|
5.5
|
38.5
|
24
|
7.5W
|
6Y
|
|
6.5
|
6
|
39
|
24.5
|
8W
|
6.5Y
|
|
7
|
6
|
40
|
25
|
8.5W
|
7Y
|
|
7.5
|
6.5
|
40.5
|
25.5
|
9W
|
7.5Y
|
|
8
|
7
|
41
|
26
|
9.5W
|
8Y
|
|
8.5
|
7.5
|
42
|
26.5
|
10W
|
8.5Y
|
|
9
|
8
|
42.5
|
27
|
10.5W
|
9Y
|
|
9.5
|
8.5
|
43
|
27.5
|
11W
|
9.5Y
|
|
10
|
9
|
44
|
28
|
11.5W
|
|
|
10.5
|
9.5
|
44.5
|
28.5
|
12W
|
|
|
11
|
10
|
45
|
29
|
12.5W
|
|
|
11.5
|
10.5
|
45.5
|
29.5
|
13W
|
|
|
12
|
11
|
46
|
30
|
13.5W
|
|
|
12.5
|
11.5
|
47
|
30.5
|
14W
|
|
|
13
|
12
|
47.5
|
31
|
14.5W
|
|
|
13.5
|
12.5
|
48
|
31.5
|
15W
|
|
|
14
|
13
|
48.5
|
32
|
15.5W
|
|
|
15
|
14
|
49.5
|
33
|
16W
|
|
|
16
|
15
|
50.5
|
34
|
16.5W
|
|
|
17
|
16
|
51.5
|
35
|
17W
|
|
|
18
|
17
|
52.5
|
36
|
17.5W
|
|
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