EU Size: 33 - US Size: 2 (Big Kids') A kids' rock shoe for growing feet. Adjustable up to 2 full sizes. PSR 3. Evolv climbing shoes are not designed to be downsized. Evolv sizing uses three categories of fit: Max Performance. Ultra Snug. Use street shoe size. Performance. Snug. Add .5 to 1.0 sizes to street size. Comfort. Relaxed. Add 1.0 to 1.5 sizes to street size. PSR is a rock shoe selection tool that ranges from (1) sensitive/smearing to (10) powerful/edging. PSR 1-3. Highly sensitive for smearing and volumes. PSR 4-7. Versatile for smearing and edging. PSR 8-10. Powerful for small holds. Evolv shoes come in 2 different volumes. Low-Volume LV is designed for a maximum performance fit and lower-volume foot shapes. Medium-Volume MV is designed for a snug fit and average-volume foot shapes. The Evolv Kids’ Venga Climbing Shoe is an incredibly comfortable option (PSR 3) for boys and girls to learn how to climb when they’re young. It features a breathable polyester upper with a single strap divided into three sections for simple adjustments accommodating your child’s ever-growing feet. We gave it a flat profile to keep their feet comfortable and slight asymmetry to help them learn how to place their feet well. It uses the same TRAX SAS rubber found on our adult climbing shoes, too.