Atomic Redster STI 90 LC Ski Boot 2024


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While the Atomic Redster STI 90 LC is for lighter junior racers, the only thing junior about this race boot is the cuff height, just a little bit lower for younger legs. Atomic’s World Cup liner tech make sure it’s got great feel and a precise connection between liner and boot shell. The Slim Race Shell makes it easier to flex than normal junior race boots. Power Control lets racers adjust both the forward lean and the precise stiffness of the boot – letting them lock in their preferred feel for tons of confidence on race day. Junior racers will feel like they’re in the big leagues with the Redster STI 90 LC.

True Size Mondopoint 22

On our women's models, we offer a true shell size in MP 22 plus an appropriate liner construction.

Dual-Sided Cuff Alignment

Allows for lateral cuff angle adjustment to match the angle of the leg for increased comfort and control.

Power Control

Allows for forward lean adjustment and an extremely solid connection of the cuff to the shell.


Polyurethane (PU) plastic delivers great skiing performance, suspension, and progressive flex.

Low Cuff - All Sizes

A 15mm lower cuff on all sizes within the size range.

World Cup

3D Stretch Toe Box

Asymmetrically shaped for left/right, 3D Stretch Toe Box allows for extra length and big toe comfort.

Full Microfiber Outer

35mm Velcro Strap

Simple and effective 35mm Velcro power strap.

7000-Series Aluminium Buckles

Your foot sits neutral/straight inside the boot.

Racing Sole (non-replaceable)

Solid plastic sole used in World Cup racing that delivers performance, stability, and precision.

Size Adjuster

Sizing inserts that can be added under the footbed to make any boot precisely a half size smaller.

2nd Power Control Screw

Liner Laces

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