Designed to build confidence and skill from the ground up, the Lange RSJ 65 is the ideal blend of comfort, control, and junior-specific performance. Built for young skiers up to age 12, this boot delivers an easy, progressive flex that helps developing racers and all-mountain skiers stay balanced, warm, and in control all day long.
The mono-injected polyurethane shell offers durability and smooth energy transfer, while Lange’s Anatomic Junior Fit is carefully shaped for smaller calves and foot volumes—eliminating pressure points and maximizing comfort. A supportive Control Fit junior liner, four aluminum buckles, and a secure 30 mm power strap ensure a snug, confidence-inspiring hold that encourages proper technique without overpowering lighter skiers.
From first gates to full days on the mountain, the RSJ 65 provides young athletes with the support they need and the comfort they’ll love.
Flex Index: 65 (junior-specific, progressive)
Fit: Anatomic Junior Fit
Shell: Mono-injected Polyurethane
Liner: Junior Control Fit liner
Closure: 4 aluminum buckles + 30 mm power strap
Cuff Material: Lyfran
Bootboard: Polypropylene
Soles: Mono-material, Junior GripWalk® compatible
Spoiler: GripWalk compatibility
Design: Aero Design approved by Sauber Engineering
The RSJ 65 is engineered to match the strength, weight, and biomechanics of young skiers, offering a flex that’s supportive yet forgiving for skill development.
Tailored for smaller calves and feet, this fit enhances comfort, warmth, and control—helping kids ski longer with better balance.
PU construction delivers reliable rebound, smooth flex, and long-lasting durability season after season.
Four lightweight aluminum buckles provide even pressure distribution and easy adjustment for growing feet.
Junior GripWalk-compatible soles improve traction and natural walking comfort (kits sold separately).
Mono-material toe and heel pieces can be replaced to extend the life of the boot.
Age Range: Junior (approx. 12 & under)
Flex: 65
Last: Junior-specific
Shell Material: Polyurethane
Cuff Material: Lyfran
Buckles: 4 aluminum
Power Strap: 30 mm
Boot Sole: Mono-material, replaceable
Walking Compatibility: Junior GripWalk® compatible
Ski boots are sized in Mondopoint, based on the length of your foot in centimeters. The chart below is a general reference for converting between sizing systems.
This chart is not a fitting. The only way to know your ski boot size is to be fit in person, either with a Boot Fitting at our shop or from a professional fitting you have had elsewhere. Sizing, shape, and volume vary by brand and model, and a performance fit is snugger than your street shoe. Unworn boots can be returned under our return policy, but a boot that doesn't fit can be a big hassle for your trip if you haven't tried it on.
| Mondo (cm) | US Men's | US Women's | EU |
|---|---|---|---|
| 22/22.5 | 4/4.5 | 5/5.5 | 35 |
| 23/23.5 | 5/5.5 | 6/6.5 | 36/37 |
| 24/24.5 | 6/6.5 | 7/7.5 | 38 |
| 25/25.5 | 7/7.5 | 8/8.5 | 39/40 |
| 26/26.5 | 8/8.5 | 9/9.5 | 41 |
| 27/27.5 | 9/9.5 | 10/10.5 | 42/43 |
| 28/28.5 | 10/10.5 | 11/11.5 | 44 |
| 29/29.5 | 11/11.5 | – | 45/46 |
| 30/30.5 | 12/12.5 | – | 47 |
| 31/31.5 | 13/13.5 | – | 48/49 |
| 32/32.5 | 14/14.5 | – | 50 |
Conversions are approximate and can differ by half a size between brands.
Ski boots are built with one shell for each full and half size, so a 27 and a 27.5 are the same boot with a different liner or footboard. That is why sizes are listed together, like 27/27.5.
Very few models differ from this. Scarpa is the main exception, pairing sizes the other way (for example, 26.5/27 share a shell). When a model is sized differently, we call it out on that product's page.
Book a Boot Fitting with our team at (802) 253-4531. Preliminary boot work is included with every boot purchase.
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