How should the L-1 PrimaLoft Insulation Pant fit?

The L-1 is designed with a unisex fit based on men's sizing. For women, we recommend choosing one size down from your usual size for a better fit. The ¾ length is intended to sit above the ankle, pairing well with tall ski socks and ski or snowboard boots.

Can these midlayer pants replace a jacket in mild weather?

The L-1 PrimaLoft Insulation Pant is built as a lower body midlayer for warmth under shell pants. It is not intended to replace a jacket, but it can be worn alone indoors or for light activity in mild, dry conditions.

Are these pants suitable for ski touring and other high-output activities?

Yes, the L-1 uses PrimaLoft Gold Eco insulation for warmth without bulk and features stretch fleece panels for mobility. The windproof front and breathable back help regulate temperature during ski touring, alpine skiing, or winter hiking.

How do I care for and wash the L-1 PrimaLoft Insulation Pant?

Wash at 40°C with mild detergent. Do not bleach, dry clean, or use fabric softener. Tumble dry on low heat and wash inside out with fasteners closed for best results.

Is the insulation in these pants eco-friendly?

Yes, the PrimaLoft Gold Eco insulation is made with 55% recycled content, offering warmth and compressibility with a lower environmental impact.

Can I use these pants for both skiing and snowboarding?

Absolutely. The L-1 is designed as a versatile midlayer for skiing, snowboarding, and other cold weather mountain activities. The ¾ length works well with both ski and snowboard boots.

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Black ¾ length insulated ski midlayer pant from The Mountain Studio, featuring quilted PrimaLoft Gold Eco synthetic insulation, stretch fleece panels at the cuffs, and a technical drawcord waist for secure fit and layering comfort. image

Person wearing The Mountain Studio L-1 PrimaLoft Insulation Pant in black, showing the ¾ length fit, quilted synthetic insulation, stretch fleece cuffs, and technical waistband, styled with ski socks and a base layer top for cold weather activity. image

Woman wearing The Mountain Studio L-1 PrimaLoft Insulation Pant in black, highlighting the ¾ length, quilted synthetic insulation, stretch fleece lower legs, and technical waistband, paired with tall ski socks and a base layer top for cold weather performance. image

Man wearing The Mountain Studio L-1 PrimaLoft Insulation Pant in black, featuring quilted synthetic insulation, ¾ length cut, stretch fleece lower legs, and a technical waistband, paired with ski socks and a performance base layer top. image

Woman wearing The Mountain Studio L-1 PrimaLoft Insulation Pant in black, showing the ergonomic ¾ length fit, quilted synthetic insulation, stretch fleece lower legs, and technical waistband, styled with ski socks and a performance base layer top. image

L-1

1,700.00 kr

Primaloft® Insulation Pants
Black Onyx

Use our size guide

The L-1 PrimaLoft Insulation Pant from The Mountain Studio is engineered as a midlayer for cold weather skiing and snowboarding. This ¾ length insulated pant uses PrimaLoft Gold Eco, a premium synthetic insulation made with 55% recycled content, to deliver reliable warmth without added bulk. The insulation remains lightweight, compressible, and effective even when wet, supporting performance in harsh mountain conditions.

Designed for active use, the L-1 features stretch fleece panels for freedom of movement and a technical drawcord waist for a secure fit. The windproof front fabric shields against cold air, while the breathable, warmer fabric at the back helps regulate temperature during high-output activity. The ¾ length is tailored for compatibility with tall ski socks and ski or snowboard boots, reducing bulk and improving comfort inside footwear.

This insulated midlayer pant is available in black and built for versatility, functioning as a reliable liner for ski touring, alpine descents, or winter hiking. The ergonomic construction and unisex fit ensure adaptability for a wide range of users and scenarios. Durable materials and careful detailing reflect The Mountain Studio’s commitment to longevity and mountain-ready design.

The Mountain Studio prioritizes sustainable material choices, using recycled PrimaLoft Gold Eco insulation and robust technical fabrics. The L-1 PrimaLoft Insulation Pant is a dependable addition to any mountain ski gear system, offering warmth, breathability, and lasting performance from groomers to backcountry tours.

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	38 cm	40 cm	42 cm	44 cm	46 cm	49 cm
INSEAM	53 cm	53.5 cm	54 cm	54.5 cm	55 cm	55.5 cm

Size guide liner pants

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Primaloft® Insulation Pants
Black Onyx

Engineered in Switzerland

Primaloft® Insulation PantsBlack Onyx

Description

Features & materials

Care

Shipping & Returns

How should the L-1 PrimaLoft Insulation Pant fit?

Can these midlayer pants replace a jacket in mild weather?

Are these pants suitable for ski touring and other high-output activities?

How do I care for and wash the L-1 PrimaLoft Insulation Pant?

Is the insulation in these pants eco-friendly?

Can I use these pants for both skiing and snowboarding?

Engineered in Switzerland

Primaloft® Insulation Pants
Black Onyx