The Defy is an ideal step up for newer climbers looking for more precision without jumping straight into high-aggression footwear. This shoe helps you feel more connected to the wall, with its slightly downturned shape and more asymmetric fit than most beginner models. The strap version offers a softer, more sensitive feel than the lace-up, giving you better feedback on volumes and smears._To help you find the right balance between flexibility and support, the PSR (Performance Shape Rating) scale runs from 1 to 10. A rating of 1-3 is best for soft, sensitive shoes, great for smearing and volumes. 4-7 offers a balance—ideal for both smearing and edging. If you're looking for something stiffer for small edges, consider shoes rated 8-10. Enjoy your climb in comfort and style._Max Performance: Use your street shoe size for an ultra-snug fitPerformance Fit: add a ½ size to your street shoe for a snug fit that is still comfortable to wear for a full sessionComfort Fit: add 1 to 1.5 sizes to your street shoeSplit tongue opening: for easy entrySingle strap closure: for a secure fitSoft heel construction: for all-around comfortPerforated upper: for breathabilityMidsole: 1.6mm plastic full lengthOutsole: 3.5mm TRAX SAS RubberUpper: SYNTHETICVolume: 0 (Medium volume)PSR: 4Weight: 215g per shoeMaterials: 100% Synthetic Vegan