Please note that the buying options are available in Universal European Sizing.To find the corresponding UK and US sizes, please refer to the attached size guide image in the image gallery. Vibram V-Run Retro Womens Trainers Five Fingers Barefoot Feel Shoes Inspired by classic FiveFingers running shoes ot the past, the new V-Run Retro adds improved Vibram technology to a familliar retro classic style. The V-Run Retro features a grippy and very flexible 4mm XS Trek performance rubber outsole and a 2mm foam insole, poly sockliner and a lightweight, minimal EVA arch pad add to the shoe’s overall comfort. The nylon mesh upper upper is lightweight, breathable and soft with a super easy fast lacing system to secure your foot in the shoe. This shoe is equally at home in either the gym or out on the tarmac. This is a perfect allrounder. Ideal uses include road running, track running, treadmill running, crossfit and HIT session training. XS TREK: Optimal balance of traction and durability Responsive on unpredictive terrain Engineered for stability and comfort UPPER MATERIAL: Microfiber material Machine Wash Cold, Air Dry SKU: 21W8002 Sizes Guide: 36 ( UK 3 ) 37 ( UK 4 ) 38 ( UK 5 ) 39 ( UK 5.5 ) 40 ( UK 6 ) 41 ( UK 7 ) 42 ( UK 8 )