Rab Ridge Raider Bivi Review
A bivvy bag is a hard sell to anyone used to a tent — no porch, no room to sit up, and a fair bit of trust required in the fabric over your face. The Rab Ridge Raider Bivi is aimed squarely at people who've made peace with that trade-off in exchange for weight and speed, and we've used it on backpacking and bikepacking trips to see how it holds up on genuinely wet UK nights.
What it is
The Ridge Raider is a freestanding single-skin bivi that combines a fully waterproof bathtub base with an air-permeable upper made from Pertex Shield Air — a 3-layer fabric with an enhanced air-permeable membrane designed to cut condensation build-up, which is the classic bivvy bag failure point. Rab rate the fabric at a 15,000mm hydrostatic head with a 25,000 g/m²/24h breathability (MVTR) rating, a genuinely strong pairing on paper that's meant to keep rain out while still letting the moisture from your breath and body escape overnight.
It uses an overhead hoop plus a smaller micro pole at the foot end to lift the fabric off your face and give some real structured volume inside — Rab quote an internal height of around 60cm, noticeably more tent-like than a flat bag-only bivvy. The zipped main entry has an integrated mosquito mesh door for warm-weather ventilation. Total weight is around 890g, with a packed size of about 32 x 15cm, so it sits between an ultralight bag-only bivvy and a full lightweight tent in both weight and comfort.
Pros
- Pertex Shield Air upper genuinely reduces condensation compared with a fully waterproof-both-sides bivvy
- Hoop and micro-pole structure gives real head room and stops fabric collapsing onto your face overnight
- Freestanding design pitches on hard ground or rock where tent pegs aren't an option
- Mesh door option is useful for warm nights or for stargazing without fully exposing yourself to midges
Cons
- Heavier and bulkier than a minimalist bag-only bivvy, so it's not the lightest option in this category
- Single-skin, single-person design means no room for gear storage beyond what fits beside you
- Premium price point compared with simpler bivvy bags
- Still a bivvy — condensation reduction is relative, not eliminated, on a genuinely still, humid night
Who it's for
It suits backpackers and bikepackers who want to shave weight and bulk versus a tent without going all the way to a basic survival bivvy, particularly for trips where fast, flexible pitching on variable ground matters — wild camping on hillsides, long-distance trail routes, or multi-day bikepacking where minimal packed volume counts. Anyone who wants to sit up, cook inside a porch, or store a pack out of the weather is better served by a lightweight one-person tent.
Our verdict
The Ridge Raider does a genuinely good job of solving the bivvy bag's usual condensation problem, and the hoop structure makes it feel far less claustrophobic than a flat bag design. It's a considered, well-made option for minimalist backpacking and wild camping where a tent is more weight and hassle than the trip needs — just go in accepting the trade-offs a bivvy always brings.