How do the Y-1 PRO pants fit, and what size should I choose?

The Y-1 PRO pants use men's sizing and have an ergonomic adjustable waistband. For women, consider sizing down for a better fit. Refer to the measurement chart for details.

Are these pants suitable for harsh weather and multi-day use?

Yes, the 3-layer GORE-TEX Pro shell is durably waterproof, windproof, and highly breathable. The reinforced Cordura bottom legs add durability for extended use in demanding alpine conditions.

How do I care for my Y-1 PRO shell pants?

Machine wash at 30°C with mild detergent. Do not use fabric softener or bleach. Wash inside out and close all fasteners. Tumble dry on low heat to reactivate the waterproof membrane.

Can I use these pants for both skiing and mountaineering?

Yes, the Y-1 PRO pants are designed for skiing, snowboarding, ski touring, and mountaineering. The ventilation zippers and rugged shell support a wide range of winter activities.

Are the Y-1 PRO pants compatible with layering systems?

These shell pants are built for layering. You can pair them with technical baselayers and insulated pants to adapt to changing temperatures and activity levels.

What color options are available for the Y-1 PRO pants?

The Y-1 PRO pants are available in beige, black, blue, and green.

+ Zoom

$Person dressed for alpine skiing in The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red technical jacket, tan gloves, ski boots, and a helmet with goggles, highlighting the pants' ergonomic fit, zippered thigh pocket, and reinforced cuffs. image$

$Close-up of The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, featuring ergonomic fit, zippered thigh pocket, reinforced cuffs, and worn with ski boots, a red technical jacket, and tan gloves for alpine skiing. image$

$Side view of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, styled with a red technical jacket, ski boots, tan gloves, and a black beanie with goggles, highlighting the pants' articulated fit and alpine performance design. image$

$Side profile of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red alpine jacket, tan gloves, ski boots, and a black beanie with goggles, highlighting the pants' articulated fit and technical alpine design. image$

$Rear view of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red alpine jacket, tan gloves, ski boots, and a black beanie with goggles, showing the pants' articulated fit and reinforced cuffs for mountain performance. image$

$Y-1 PRO image$

$Person dressed for alpine skiing in The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red technical jacket, tan gloves, ski boots, and a helmet with goggles, highlighting the pants' ergonomic fit, zippered thigh pocket, and reinforced cuffs. thumbnail image$ $Close-up of The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, featuring ergonomic fit, zippered thigh pocket, reinforced cuffs, and worn with ski boots, a red technical jacket, and tan gloves for alpine skiing. thumbnail image$ $Side view of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, styled with a red technical jacket, ski boots, tan gloves, and a black beanie with goggles, highlighting the pants' articulated fit and alpine performance design. thumbnail image$ $Side profile of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red alpine jacket, tan gloves, ski boots, and a black beanie with goggles, highlighting the pants' articulated fit and technical alpine design. thumbnail image$ $Rear view of a person wearing The Mountain Studio Y-1 PRO GORE-TEX Pro 3L shell pants in black, paired with a red alpine jacket, tan gloves, ski boots, and a black beanie with goggles, showing the pants' articulated fit and reinforced cuffs for mountain performance. thumbnail image$

$Y-1 PRO thumbnail image$

Y-1 PRO

7,700.00 kr

Gore-Tex® Pro 3L 150D Shell Pants
Black Onyx

Use our size guide

The Y-1 PRO GORE-TEX Pro 3L 80D Shell Pant from The Mountain Studio is engineered for demanding alpine environments. Built with rugged 80 denier GORE-TEX Pro fabric, these shell pants deliver durable waterproofing, complete windproof protection, and high breathability for skiing, snowboarding, and ski touring. The three-layer construction stands up to harsh weather and heavy use, making these pants reliable for backcountry and resort terrain.

Performance features include two large side ventilation zippers for rapid temperature regulation and a 3D adjustable waistband for ergonomic fit and comfort. The waistband back is insulated with Dupont Sorona, a lightweight, breathable, partially plant-based material that adds warmth at the lower back without bulk. Reinforced bottom legs use 600 denier Cordura, color-matched for a clean finish, to resist abrasion from boots and gear.

Available in beige, black, blue, and green, the Y-1 PRO pants offer a minimalist silhouette and practical pocket placement for mountain essentials. The design supports layering with technical baselayers and insulation pants, adapting to changing conditions and activity levels. These pants are suitable for both men and women, with sizing based on men's measurements for a tailored fit.

The Mountain Studio prioritizes longevity and responsible material choices, using GORE-TEX Pro and Sorona insulation for extended product life and sustainable performance. The Y-1 PRO shell pants are built for repeated use in all weather, supporting a versatile mountain lifestyle from summit descents to everyday winter activities.

What’s my size?

We feel that the best method to determine your size is to measure a similar favorite garment you already own – i.e. an insulated ski jacket if you are buying an insulated ski jacket etc. Compare with the chart below which is unique for each product. Please bear in mind that our shell garments are made to be quite loose fitting, to be able to add one or more layers beneath.

Flip horizontal to view full size chart on mobile.

How to measure

1/2 WAIST: Measure the top of the waistline straight from side to side
INSEAM: Measure from crotch point to bottom of leg along the inseam

Size	XS	S	M	L	XL	XXL
1/2 WAIST	41 cm	43 cm	45 cm	47 cm	49 cm	52
INSEAM	79 cm	79.5 cm	80 cm	80.5 cm	81 cm	81.5

Log in

Gore-Tex® Pro 3L 150D Shell Pants
Black Onyx

Engineered in Switzerland

Gore-Tex® Pro 3L 150D Shell PantsBlack Onyx

Y-1 PRO (Black Onyx)

Y-1 PRO (Kelp)

Y-1 PRO (Nugget Gold)

Y-1 PRO (Delicioso Brown)

Y-1 PRO (Forest Green)

Y-1 PRO (Blue Quartz)

Y-1 PRO (Castle Wall)

Y-1 PRO (Kelp)

Y-1 PRO (Forest Green)

Y-1 PRO (Dark Navy)

Description

Features & materials

Care

Shipping & Returns

How do the Y-1 PRO pants fit, and what size should I choose?

Are these pants suitable for harsh weather and multi-day use?

How do I care for my Y-1 PRO shell pants?

Can I use these pants for both skiing and mountaineering?

Are the Y-1 PRO pants compatible with layering systems?

What color options are available for the Y-1 PRO pants?

Engineered in Switzerland

Gore-Tex® Pro 3L 150D Shell Pants
Black Onyx