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Big Agnes Rapide SL Insulated — Specs & Analysis
Manufacturer specifications, compared against every other sleep systems in our database. We do not test gear in the field — we measure, verify, and compare.
An ultralight inflatable sleeping pad from Big Agnes with Primaloft insulation for an R-value of 4.8. The Rapide SL packs small, inflates fast, and delivers four-season warmth at a competitive weight.
The Big Agnes Rapide SL Insulated is a sleeper hit in the ultralight sleeping pad market. At 340 grams with an R-value of 4.8, it delivers four-season warmth at a weight that rivals pads rated for far less insulation. For bikepackers who ride into cold conditions, this warmth-to-weight ratio is among the best available.
The Primaloft synthetic insulation maintains its R-value consistently, unaffected by humidity or temperature swings. This makes it more predictable than some down-insulated pads that can lose performance in cold, damp conditions. The insulation is bonded to the internal baffles, preventing shifting and cold spots.
Inflation is handled by Big Agnes's high-volume valve, which fills the pad in about 10 breaths. Deflation is equally fast through a separate dump valve. The pad is 7.5 cm thick, providing excellent cushioning for side sleepers on rough ground. The surface is lightly textured to prevent sleeping bag slippage.
Packed size is impressive at 23 x 9 cm — small enough to fit inside a frame bag alongside other items. The 20D ripstop top fabric is reasonably durable for an ultralight pad, though it is still susceptible to punctures from thorns or sharp rocks. A repair kit is included.
Compared to the Therm-a-Rest NeoAir XLite NXT, the Rapide SL is slightly lighter with a higher R-value, at a lower price point. It is less well-known but arguably the better value. The NeoAir has a longer track record, but the Rapide is catching up quickly in reputation.
For four-season bikepackers who need serious insulation without serious weight, the Big Agnes Rapide SL Insulated is one of the most compelling options on the market today.
Who Is the Big Agnes Rapide SL Insulated Best For?
Four-season bikepackers who need maximum insulation at minimum weight. If that describes your riding style, the Rapide SL Insulated should be at the top of your shortlist. It sits in the Sleep Systems category alongside 19 other products we track.
How It Compares
At 340g and $169.95, the Rapide SL Insulated is 90g heavier than the lightest option in this category (the Therm-a-Rest NeoAir UberLite at 250g). The most budget-friendly option is the Cascade Designs Therm-a-Rest Z Lite Sol at $50.
The price-to-weight ratio comes in at $50 per 100g — a premium price point, but you're paying for quality, materials, and design that justify the investment for serious bikepackers.
What We Like
- +Excellent R-value of 4.8 for four-season warmth
- +Very light at 340 grams for the insulation level
- +Compact packed size fits easily in bike bags
- +Synthetic insulation is moisture-immune
Watch Out For
- −20D fabric is still puncture-susceptible
- −Less established reputation than NeoAir line
- −Slightly noisy compared to foam-insulated pads
The Bottom Line
We haven't scored the Big Agnes Rapide SL Insulated, and neither has anyone else we can cite. It's here for its verified specifications and dimensions, which is what the fit tools run on — a score is an editorial judgement, and we don't hand one out until someone has a basis for it. What this page can tell you is measured: 340g, $169.95, and how both sit against every other sleep systems product we track.
Price checked against the manufacturer on 25 August 2026 — see the source. The weight above has not.
Specifications and dimensions come from the sources listed above. Where a page draws on first-hand riding, it says so.
What it packs down to
Big Agnes publishes a packed size of 23 x 9 cm, which is 1.5 litres as a stuff sack. Of the 55 bags we track that publish a capacity, 44 have room for it and 11 do not.
Volume is computed from Big Agnes's own packed size, treating a two-dimension figure as a stuff sack. Bag capacities are the makers' published figures, not ours — 12 of the bags we hold dimensions for publish no capacity and are left out of the count rather than assumed. A stuff sack does not reshape itself, so read the headroom as room to spare rather than a guarantee it goes in easily.
How it compares
Against the 20 sleep systems we hold published specs for.
At 340g the Rapide SL Insulated is lighter than 16 of 19 alternatives we track, which makes it among the lightest we track. The category median is 465g.
At $169.95 it undercuts 16 of 19 of them, against a median of $235. That works out at $50 per 100g — below the $53 median for sleep systems.
Weight and price come from published specifications. Cost per 100g is a blunt measure — it rewards light gear and says nothing about durability or whether the thing works — so treat it as one input, not a verdict.
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