adidas Equipment CSG 91 Trainers in Core Black. adidas have designed a trainer that clever blends style and functionality perfectly. An original 90s-style silhouette has been elevated with a multi-textured exterior helping to improve the breathability, comfort and durability of the trainer. While a large 'Torsion' rubber sole offers plenty of grip to the silhouette, this sneaker is the perfect shoe to add to your adventure trainer collection.