The fifth edition of the Kinvara features a Pro Lock lacing system for the adaptable, dynamic midfoot fit. The collar has been redesigned for more comfort & the upper features a more durable mesh. Despite the upgrades, the shoe still only weighs slightly over 200g!A minimalist approach to shoe design has brought about this excellent running shoe; lightweight & responsive, it aids the foot in moving through the gait cycle as smoothly as possible while offering an incredible fit. There is Flexfilm technology in the upper to secure the foot on the platform throughout the gait cycle & a 4mm heel-to-toe offset encourages a more balanced running form. Pro-Lock supportive straps on either side of the midfoot encase the foot to deliver an incredibly plush ride throughout. This shoe features i BR Plus; a material that is over a third lighter than standard blow rubber & provides even more cushioning. The midsole consists of high abrasion EVA; lightweight with excellent cushioning & durability.