The Petzl Whisper Harness is an ultra-lightweight and technical climbing harness designed for high-performance climbing and mountaineering. Built with innovative MATRYX® Technology, it combines extremely low weight, compactness, breathability, freedom of movement, and durability without sacrificing the gear-carrying capacity expected from a technical harness. At just 170 g in size M, the WHISPER is designed to feel practically unnoticeable while climbing and takes up minimal space in a pack.

Ultra-Lightweight and Ultra-Compact

The Petzl Whisper Harness is particularly well suited to climbers and mountaineers who count every gram. Its slim and flexible waistbelt and leg loops follow the body’s movements naturally, providing exceptional freedom of movement while climbing.

The harness folds down easily for efficient packing, making it an excellent choice for long approaches, multi-pitch routes, alpine climbing, and mountain expeditions where equipment weight and pack volume matter. Petzl lists the WHISPER at 140 g in XS, 155 g in S, 170 g in M, and 185 g in L.

MATRYX® Technology for Comfort and Breathability

The WHISPER uses high-performance MATRYX® Technology fabric, which combines high-modulus polyethylene (HMPE) and nylon strands to create a lightweight and abrasion-resistant construction. The fabric is designed to quickly wick away perspiration while the climber is moving.

Despite its minimalist construction, the harness provides comfortable support when hanging on the rope or working at an anchor. Specific areas of the MATRYX® construction are padded to improve comfort and support without adding unnecessary bulk.

Durable Construction for Demanding Climbing

The Petzl Whisper Harness is engineered for long-lasting use in demanding climbing environments. The MATRYX® fabric provides high abrasion resistance, while the tie-in points, webbing, and gear loops are reinforced with HMPE to improve resistance to abrasion and rubbing.

This combination of low weight and durable construction makes the WHISPER suitable for technical rock climbing, multi-pitch routes, alpine climbing, and mountaineering.

Large Gear-Carrying Capacity

Despite its ultra-lightweight design, the Petzl Whisper Harness provides substantial space for climbing equipment. It features five gear loops: two very large, rigid loops at the front for easy clipping and unclipping, plus three rear loops for additional equipment. The rear configuration is designed to remain compatible with wearing a backpack.

A flexible rear loop can be used for a tag line or essential accessories, while two dedicated slots accommodate CARITOOL tool holders, optimized for CARITOOL EVO and compatible with CARITOOL.

Key Features

• Ultra-lightweight technical climbing and mountaineering harness
• Only 170 g in size M
• Ultra-compact design for efficient packing
• Slim, flexible waistbelt and leg loops for excellent freedom of movement
• MATRYX® Technology for lightweight performance, breathability, and durability
• Fabric construction helps wick away perspiration
• Specific padded areas provide support and comfort when hanging
• HMPE reinforcement on tie-in points, webbing, and gear loops
• Two large, rigid front gear loops
• Three rear gear loops
• Flexible rear loop for a tag line or accessories
• Two slots for CARITOOL tool holders
• Includes a storage pouch made from 100% recycled polyester
• CE EN 12277 type C and UIAA certified

Specifications

• Product: Petzl Whisper Harness
• Material: High-modulus polyethylene, nylon, polyester, aluminum
• Certification: CE EN 12277 type C, UIAA
• Weight: 140 g (XS), 155 g (S), 170 g (M), 185 g (L)
• Waist Belt: 65–71 cm (XS), 71–77 cm (S), 77–84 cm (M), 84–92 cm (L)
• Leg Loops: 48–53 cm (XS/S), 52–57 cm (M), 55–60 cm (L)
• Color: White
• Gear Loops: Five
• Storage Pouch: 100% recycled polyester
• Reference: C003AA00–C003AA03
• Guarantee: 3 years

Why Choose the Petzl Whisper Harness?

The Petzl Whisper Harness is an excellent choice for climbers and mountaineers who want an exceptionally light and compact harness without giving up practical gear organization. Its MATRYX® Technology construction delivers a combination of freedom of movement, breathability, comfort, abrasion resistance, and packability that makes it particularly suited to demanding mountain routes.

Buy the Petzl Whisper Harness from Backpackers Outdoor and experience an ultra-light technical harness designed for high-performance climbing and mountaineering.