Rab Ionosphere 5.5 Sleeping Mat

Inspired by the demands of navigating hostile environments with minimal kit, the Ionosphere 5.5 makes no compromises on warmth for weight.

Designed to endure extreme temperatures and unforgiving environments, the Ionosphere 5.5 comes fully outfitted with technology to shield you from the cold. Its construction minimises heat loss through both radiation and convection, courtesy of heat-reflective TILT technology and air-trapping Stratus™ R insulation. Offering an exceptional warmth-to-weight ratio alongside a compact packed size, it stands as the ultimate high-comfort sleeping mat for alpinists and mountaineers seeking shelter in the world's harshest terrains.

Features

• Stratus™ R insulation traps air effectively and limits heat loss from convective currents
• TILT reflective film integrated within the insulation reduces radiant heat loss
• R-value of 5.5 for impressive thermal performance
• 8cm thickness balances comfort with insulation
• Oversized outer chambers keep you securely centred on the mat
• Graduated grip print finish across the upper fabric reduces movement and sleeping bag slippage
• Hybrid rectangular shape accommodates a range of comfortable sleeping positions
• Low-profile two-way valve for easy inflation and deflation
• Pump sack included for rapid, hygienic inflation without breath moisture
• Roll-away stuff sack with repair kit included

Sustainability Features

• 100% recycled insulation
• Recycled fabrics
• Fluorocarbon (PFAS) free DWR

Specifications

Technology

TILT (Thermo Ionic Lining Technology)

This heat-retention technology works like an emergency blanket, reflecting body heat back towards you while still allowing breathability and comfort. It boosts thermal efficiency, providing essential warmth when temperatures drop significantly.

Stratus™ R

This durable synthetic insulation is made entirely from 100% recycled post-consumer materials. Engineered to trap an optimal volume of air, Stratus™ R offers impressive warmth-to-weight performance, continues to insulate when damp, and dries quickly.