Mad Rock's Pulse Positive climbing shoes keep things comfortable with a flat sole and a grippy Science Friction R2 rubber rand for excellent grip. US 3/EU 34.5 or US 3.5/EU 35 Breathable mesh upper with synthetic overlays Lace-up with sneaker-like tongue Soft fabric lining EVA shock heel Flat X5 rubber outsole Science Friction R2 rubber rand Synthetic shoes will stretch little to none at all Shape of last: Flat Asymmetrical curvature Med. Outsole: Science Friction rubber Upper/Lining: Textile