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Fast inflation, strong insulation, and excellent weight-to-warmth performance
Flextail says:
The Tiny Sleeping Pad R09 AVS Mummy Long off an R-value of 9.4, designed for extreme cold environments down to -35°C, ensuring superior insulation and warmth during winter adventures.
The R09 AVS Mummy features an integrated electric pump — the AVS Capsule Pump — which inflates the pad in under 60 seconds with the push of a button, eliminating the need for an external pump or breath.
Our Verdict
The Flextail Tiny Sleeping Pad R09 AVS Mummy offers an R-value of 9.4, tested to ASTM F3340-22, and provides serious cold-weather performance at just 636g (ex bag). The larger size is a welcome upgrade, measuring 196cm by 65cm by 9cm. It’s not just longer but also noticeably wider than the standard version, which makes a real difference in comfort. I still wish they offered a rectangular option for even more space to move.
One of the standout features of this sleeping pad line is the built-in AVS Capsule Pump, a compact, rechargeable electric pump that fully inflates the pad in about 50 to 60 seconds and also handles quick deflation. The pump integrates neatly into the valve system, making setup and pack-down much faster and easier than using a pumpsack or your lungs.
While it can be tricky at first to align, seal, and remove the capsule correctly, it quickly becomes second nature with a bit of practice.
The pad also uses a "standard valve," meaning it is compatible with older Therm-a-Rest and NEMO-style pumpsacks (not the newer WingLock or Vortex types), giving you a manual inflation option if you can source an old pumpsack.
- Reviewed by Ultralight Outdoor Gear
Features
- Built-In Electric Pump (AVS Capsule Pump): This fully integrated, ultra-quiet pump inflates the mat in approximately 50–60 seconds with one-touch operation. Lightweight (34g), removable for recharging or storage, and eliminates the need for mouth inflation or extra gear.
- Enhanced Height Design: Additional air chambers in the sleeping pad enhance insulation performance significantly.
- Five-Layer Sided Aluminium Film: Upgrades the standard single sided aluminium film to high performance double sided aluminium. The five-layer design reflects heat in stages, effectively reducing energy loss.
- Innovative C-Shaped Structure: Hundreds of interlocking micro "springs" evenly distribute the aluminium film, ensuring stable thermal insulation and preventing adhesive failure.
- Ultra-Soft Support: Prevents slipping while turning, providing enhanced support and a more comfortable sleep experience.
- 9cm Thickness: Engineered for high resilience and excellent compression resistance. Ensuring superior softness and comfort.
- OEKOTEX 100 II Certified
Specifications
- Mat Weight: 636g
- AVS Capsule Pump: 36g
- Dimensions: 196cm x 65cm x 9cm
- Packed Dimensions: 28 x 13cm
- Thickness: 9cm
- R-Value: 9.4
Material & Construction
- Surface Material: 20D Nylon
- Fill Material: PET Aluminium Film
