There is an about a 1.5-size difference between men's and women's sizing.
For example, a women’s size 9 is about a men’s size 7.5.
The Undefeated x Nike Air Max 90 “White/Optic Yellow” is part of a multi-colorway pack in collaboration between two stalwarts in the sneaker and streetwear worlds. Released in late 2019, Undefeated’s reimagining of the venerable Air Max 90 features premium white leather covering the upper with a contrasting yellow leather piping wrapping the shoe. Vibrant yellow Undefeated branding appears on the bottom lace lock and on their signature five strikes logo on the heel. Additional yellow accenting surrounds the visible Air unit in the heel. The Undefeated x Nike Air Max 90 “White/Optic Yellow”