The Calm Mule boasts an easy slip-on design, featuring an adjustable side strap and a supportive foam patch on the heel. Enhanced ventilation is provided by the large opening on the medial side. The foam upper is directly attached to the midsole, while a ribbed outsole provides separation. The minimalist design is completed by tonal Nike branding on the heels and matching Swooshes on the lateral, insole, and underfoot.