Built for those who move confidently through changing weather and demanding terrain, the Crazy Jkt Boosted Proof 3L Man is a lightweight, highly packable waterproof shell engineered for serious mountain use. Designed for high-level mountaineering and ski touring, it delivers uncompromising protection while maintaining stretch, breathability, and ease of movement.

At its core is premium Dermizax® waterproof fabric, offering a 20,000 mm water column and fully heat-taped seams to seal out driving rain and wet snow. The 2.75-layer construction keeps weight low and packability high, making this jacket an essential companion when conditions are uncertain but performance is non-negotiable.

Ventilation is intelligently handled through Crazy’s proprietary Shark underarm venting system, which efficiently releases excess heat and moisture without compromising waterproof integrity. A magnet-type waterproof front zip ensures quick, intuitive operation—even with gloves—while the articulated hood features a stiffened, adjustable peak to maintain visibility and protection in harsh weather.

Every detail reflects mountain-tested functionality, from the streamlined chest storage to the internal mesh pocket that allows the jacket to pack into itself. Purposeful, protective, and refined, the Boosted Proof 3L is built for athletes who venture out regardless of the forecast.

Features

• 2.75-layer stretch waterproof shell for alpine performance

• Dermizax® fabric with 20,000 mm waterproof rating

• Fully heat-taped seams for complete weather protection

• Shark underarm ventilation system for enhanced airflow

• Lightweight, packable construction for fast-and-light missions

• Magnet-type waterproof front zipper for easy use with gloves

• Ergonomic hood with adjustable fit and stiffened peak to deflect rain

• Two external zippered chest pockets for secure, accessible storage

• Internal mesh pocket with elastic binding, doubles as a pack-away pouch

• Underarm “Shark squad” venting zones that promote airflow without leaks

• Color-contrast flat seams for durability and a technical aesthetic

• Athletic cut designed for unrestricted movement during technical ascents

Specifications

• Fabric: Dermizax® stretch waterproof membrane

• Waterproof Rating: 20,000 mm

• Construction: 2.75-layer shell

• Seams: Fully heat-taped

• Ventilation: Shark underarm ventilation system

• Closure: Waterproof magnet-type front zip

• Pockets:

  • 2 zippered chest pockets

  • 1 internal mesh packable pocket

• Hood: Adjustable with stiffened peak

• Use: Mountaineering, ski touring, alpine adventures

• Packability: Packs into internal pocket