Engineered mesh provides ventilation for your forefoot while supporting your midfoot. The partial mesh inner sleeve enhances breathability while offering and a sock-like fit. Balenciaga Triple S Trainer Grey White Fluorescent Green Balenciaga For Sale. Plush foam and mesh tongue for breathable comfort and Midsole flex grooves provide greater forefoot flexibility Balenciaga Triple S Trainers Waffle outsole for durability and great multi-surface traction.