Mountain Equipment Paiyu Women's Jacket

The Paiyu Jacket delivers surprising warmth and protection, making it perfect for high-altitude expeditions and multi-day ski trips in freezing temperatures. Its high insulation and full expedition specs make it a dependable option for 5,000 to 6,000m peaks and extended cold-weather journeys.

The dual-layer offset baffles eliminate cold spots in stitch-through jackets, offering extra warmth with minimal added weight. A heat-reflective internal fabric boosts thermal efficiency, ensuring every gram of insulation counts. Despite its exceptional warmth, the jacket remains lightweight and flexible, unlike bulkier options that use box wall construction.

The Mountain HC Insulated Hood provides crucial protection during summit pushes and adjusts easily for a snug fit, with or without a helmet. Inside, a zippered security pocket and two large internal mesh pockets keep essentials and water from freezing when the temperatures drop even further.

Features

Insulation

• The jacket contains 269g [size 12] of premium duck down with a minimum 90/10 ratio and 700 fill power, offering superb warmth while keeping weight and pack size to a minimum.
• Insulation has been carefully distributed using a baffle-by-baffle method to maximise thermal efficiency for the given down weight.
• The down is responsibly sourced in line with DOWN CODEX© and the RDS 3.0 standard, supporting high standards of animal welfare.
• A unique DOWN CODEX© code included with each product allows users to trace the down’s origin and view precise content and fill power specifications.

Materials

• The outer fabric is DRILITE® LOFT, featuring a PU coating and 40 Denier shell that provides both lightweight construction and reliable weather resistance.
• The lining is a finely woven, downproof 20 Denier fabric that ensures excellent breathability, comfort against the skin, and efficient packability.

Patterning & Design

• A double-layer, offset baffle construction is used throughout to eliminate cold spots while preserving freedom of movement.
• The jacket is designed to be comfortably layered over other mountain garments when necessary.

Hood Configuration

• The Mountain HC Insulated Hood is engineered for versatility, offering a snug and protective fit with or without a helmet.
• External seams on the hood have been reduced to enhance weather protection.

Pocket Configuration

• Two zipped handwarmer pockets and two chest pockets allow quick access to essential items.
• An internal zipped security pocket and two large inner mesh pockets offer storage for gloves, a water bottle, or items that benefit from staying warm.

Centre Front Zip

• A two-way YKK® moulded centre front zip ensures ease of use even when wearing gloves.
• An offset, insulated rear baffle minimises heat loss and prevents cold air penetration.

Cuffs & Sleeves Configuration

• Cuffs are both elasticated and adjustable, making them glove-friendly and easy to operate.
• The sleeves are tailored to promote unrestricted arm movement.

Waist & Hem Construction

• Dual tether drawcords at the hem provide adjustability and help to trap warmth effectively.

Further Features

• The jacket comes with a lightweight stuff sack for compact storage.
• The shell fabric is sourced from Taiwan.
• Design and development take place in the UK, with manufacturing carried out in China.
• Built for durability, the product is supported by a comprehensive Product Lifetime Guarantee.
• Mountain Equipment is a proud member of the Fair Wear Foundation.
  
  

Specifications

Technology

	Down Codex Since 2009, our DOWN CODEX® programme has set high ethical standards for down sourcing, eliminating live-plucking and force-feeding, and ensuring only top-quality virgin down is used, certified to the Responsible Down Standard (RDS).
	Drilite Loft Drilite® Loft is Mountain Equipment's exclusive range of highly water-repellent fabrics used in their insulated clothing and equipment. The original Drilite® Loft introduced almost 30 years ago, was years ahead of its time: a highly breathable, lightweight, and very water-repellent fabric. Those three hallmarks continue with their modern Drilite® Loft fabrics.
	Fair Wear As a member of Fair Wear, Mountain Equipment is committed to implementing the highest standards of working conditions.
	Down 700 Down is the finest insulator. Its warmth-to-weight ratio, compressibility, long lifespan, and softness are yet to be matched by manmade insulations. For all but the most serious expeditions, Duck Down is a great choice for both insulated clothing and equipment.