Boreal Ninja Jr Vent kids' climbing shoes grow with your child. Each pair covers two consecutive EU sizes, so a young climber gets a secure fit today and room to grow into the second size, without you buying new shoes every few months.

The Ninja Jr Vent is based on Boreal's popular adult shoes but shaped for children: a soft, breathable knitted synthetic upper that keeps small feet cooler on busy sessions, a padded CHS heel that adjusts to hold the fit as feet grow, and a wide, easy-access velcro design that makes putting them on simple. Underfoot, Boreal's Zenith Quattro rubber grips well on indoor walls and on natural rock, so the shoes are as happy at climbing lessons as they are on a first outdoor route.

Sizing is straightforward: choose the pair that includes your child's usual EU shoe size. A child in an EU 31 would normally take the 31-32. We recommend a comfortable, close fit rather than aggressive downsizing – kids should be able to wear them without pain, curled toes or pressure points.

Why you'll love it

• Two sizes in one pair – each shoe spans two consecutive EU sizes for growing feet
• Adjustable padded heel – the CHS heel keeps the fit secure as your child grows
• Cool, breathable upper – soft knitted synthetic textile for long indoor sessions
• Reliable grip – Boreal Zenith Quattro rubber sole for indoor walls and natural rock
• Easy on and off – wide, easy-access design with velcro closure

Good to know

• Sizes: paired EU sizes from 27-28 to 37-38 (six options)
• Upper: breathable synthetic knitted textile, vegan
• Construction: slip-lasted
• Sole thickness: approximately 4-4.6mm, depending on size
• Weight: approximately 320g per pair in EU 29-30
• Fit: wide, higher volume
• Colour: Blue/Black

Who it's for

Beginner and developing junior climbers doing climbing lessons, regular indoor sessions, bouldering and their first sport routes outdoors. If you want a comfortable kids' shoe that lasts more than one growth spurt, this is the one to pick.