Nitro Sentinel Step On® BOA® Boots

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Tech Details

BOA® Fit System

The BOA® Fit System featuring H4 dial is built to withstand impact in the park, backcountry, and everything in between with micro-adjustable precision fit. Engineered to perform in the toughest conditions, BOA® Dials and Laces are guaranteed for the lifetime of the product on which it is integrated.

Nitro Step On® Outsole

Nitro’s Step On® Outsole is fully compatible with Step On® bindings for fast, secure, and effortless boot-to-binding engagement. Its abrasion-resistant, high-grip rubber compound and traction-focused tread provide dependable grip and long-lasting durability. Depending on the color, the outsole contains up to 3% recycled rubber

EVA Midsole

A molded EVA midsole reduces the overall weight and provides dampening, comfort, and thermal insulation.

Armored Spine

We are using an anatomically shaped and 3D molded heel reinforcement to provide even boot flex and long-lasting heel fit.

ILS (Internal Lacing System)

Our ILS system features a lacing harness firmly connected to the boot shell. This harness snugly wraps around the liner, securing it in the shell and providing precise lacing and fit. Our engineered ILS laces provide less friction and a Dyneema® core for added strength.

Internal Ankle Support

Nitro’s Internal Ankle Support is an anatomically shaped and pliable support piece distributes lace pressure over the instep area and provides extra support against toeside turn impact. The result is more comfort and a better, more precise fit.

Liner

Cloud 3 Liner

Our Cloud 3 liner combines proven classic Nitro fit and comfort with our signature materials and design concepts in a lightweight, affordable package. No compromises on fit, no matter what the budget!

Features

Pre-Molded Thermacell – Perfect out-of-the-box fit
Heat Moldable – Custom fit for everyone
Patented Re/Lace Liner Locker – Easy and precise liner lacing, all day long
DLS (Direct Lacing System) – Dyneema® low-friction laces for ultimate fit and comfort
Support Frame – For constant flex and durability
3D Shaped Tongue – High precision fit and comfort
3D Heel Construction – Zero heel lift
Latex Memory Pads – For a lifetime heel fit
Flex Toe – Expands for custom toe box fit

Footbed

Anatomical Footbed – Ergonomic shape for support and cushioning

Liner Tech

Pre-Molded Thermacell

All Nitro Liners are constructed from Thermacell material, using Nitro specific lasts designed with decades of experience in snowboard boot design. This ensures long lasting fit and comfort without fatigue and boot pack-out.

Heat Moldable

Nitro’s Thermacell material will adapt to your foot’s shape over time, simply by wearing your boots out riding. But they can easily be custom fitted by heat molding your liners either in shop, using a specific heating system and tools, or even at home.

Patented Re/Lace Liner Locker

Nitro’s patented Re/Lace Liner Locker provides a secure closure, allowing for easy tightening of your liner by simply pulling up on the lace handle – even when your boot shell is already tied. This allows you to (re)tighten your liner and foothold throughout the day (wherever you may find yourself on the mountain) without having to untie your boots shell lacing system.

DLS (Direct Lacing System)

Directly connected to the liner, the Nitro’s DLS also features Dyneema® loaded low-friction laces on selected models for ultimate fit and comfort.

Support Frame

To compliment our DLS liner lacing, we are building a reinforced support frame around the liner’s outside. It keeps the liner in shape and provides constant flex and durability.

3D Shaped Tongue

The liner tongue is in direct contact with the foot’s most sensible are – the instep. We carefully construct this part of the liner, using multiple pieces and materials, to achieve the best possible combination of comfort and foot enclosure.

3D Heel Construction

Let’s face it: heel lift sucks. This is why we are going through the effort of custom-building a 3D shaped heel pocked into our liners. The result is a positive heel lockdown, but with comfort and ergonomic feel.

Latex Memory Pads

We spend a lot of time on the material composition, design, and positioning of Nitro’s signature Latex Memory Pads. They are one of our key liner features and will keep your ankle area comfortable and supported all day long.

Flex Toe

Nitro introduced flexible liner toe-box construction more than two decades ago. The refined Flex Toe uses adaptable material to accommodate size variations and create a consistent left-to-right fit. By allowing the toes to move naturally instead of being compressed inside a rigid toe box, it improves comfort and helps feet stay warmer throughout the day.

Find your size

Explore boot fit guide

	Women's						Women's & Men's							Men's
Mondopoint	220	225	230	235	240	245	250	255	260	265	270	275	280	285	290	295	300	310	320	330
US Men's	4	4.5	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11	11.5	12	13	14	15
US Women's	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11
UK	3	3.5	4	4.5	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11	12	13	14
Euro	35	36	36 ½	37	38	39	40	40 ½	41	41 ½	42	42 ½	43	43 ½	44	44 ½	45	46	47	48