Castiron Grip Little ALIEN — Kids Slip-On Climbing Shoe

Castiron Grip Little ALIEN — Kids Slip-On Climbing Shoe

The wall doesn't scale down for kids. Neither does the Little ALIEN. Most kids' climbing shoes are afterthoughts — adult shoes shrunk down, stiff where they should flex, loose where they should grip. The Little ALIEN was built differently. Slip-on design, real grip, and a flat profile that builds confidence from the very first problem. Black, Yellow, or Rose Red. One standard. Every send.

Pull it on. Climb. Pull it off. No laces. No velcro to fiddle with. The elastic heel cup keeps the shoe secure without any fuss — which means more climbing, less frustration, and more confidence on the wall. The flat profile is intentional: young feet are still developing, and an aggressive downturn at this stage does more harm than good. The Little ALIEN gives kids real grip and real performance without forcing their feet into a shape they're not ready for. Formerly Rock Planet Little ALIEN — same production, same performance. Castiron standard.

Key Specifications

• Style: Kids slip-on climbing shoe
• Closure: Slip-on with elastic heel cup — easy on, easy off, no help needed
• Sole: High-friction rubber — real grip on gym holds, slab, and vertical
• Toe Box: Flat profile — comfortable for developing feet, no aggressive curl
• Upper: Synthetic microfiber — durable, breathable, easy to clean
• Age Group: Kids
• Colors: Black · Yellow · Rose Red
• Sizes: EU 29–35 | US Kids 11.5C–4Y | UK 11.5–3
• Best For: First-time young climbers, indoor bouldering, youth programmes, climbing clubs

Size Guide

Runs true to EU size. Order your child's normal EU shoe size for a comfortable fit. For a snugger performance fit, size down 0.5 EU.

Why the Little ALIEN?

Kids don't want to stop between problems to retie laces or readjust velcro. The slip-on design means they're back on the wall in seconds. The elastic heel cup keeps the shoe secure without any fuss. The flat profile builds the footwork fundamentals that last a career — without forcing young feet into a shape they're not ready for. The Little ALIEN is where the Castiron Grip journey starts. The ONE, PR23, and N23 are where it goes next. One standard. Every send.

Best For

• First-time young climbers building footwork fundamentals
• Indoor bouldering, gym walls, and youth circuits
• Youth programmes and school climbing sessions
• Parents who want a proper climbing shoe, not a toy

Also in the Castiron Grip Line

• PR23 — flagship performance velcro, EU 35–44
• N23 — precision edge, dual velcro, EU 35–44
• SWIFT — all-round lace-up, EU 35–44
• ONE — youth velcro, EU 28–35
• HUG — kids beginner, EU 25–32