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A substantial three-person shelter built for wet and windy weather
Sea to Summit says:
Liveable. Reliable. Ready
Wind and Weather Performance - Tested to 50+ mph / 80+ km/h winds with a waterproof floor rated to 25,000mm, the Sentinel XP stands firm when others fail. Self-equalising guylines and airfoil overhangs keep it secure when other 3-season tents can’t.
Wet Weather Liveability - Comfortable even when tent-bound for days. Vertical walls, generous volume, lighter interior colours, cross-flow ventilation, big doors, and headroom make it reliably liveable. Dry set-up and takedown ease the hassle in wet climates.
Adaptable to Changing Conditions - Weather shifts fast — your tent should too. Multiple set-ups provide ventilation and protection from sun, bugs, wind, and rain. Roll back the fly to stargaze, switch to hangout mode, or seal tight when storms roll in.
Better Pitch - Green-anodised DAC poles and bluesign APPROVED, recycled Ultra-Sil LS rainfly fabric reduce water absorption, dry fast, and keep a taut, reliable pitch with minimal stretch
Our Verdict
At 2362g, the Sea to Summit Sentinel XP3 is heavier than many modern lightweight three-person tents, but it feels much more focused on liveability and protection.
The internal space is generous for three, with a 3.96m² floor area and steep walls that make the available headroom feel more usable. Oversized internal storage also gives everyone somewhere to keep smaller items organised when you are spending more time inside.
The Ultra-Sil LS fly is designed to stretch less when wet, helping it stay taut, while the 25,000mm floor inspires real confidence on saturated ground.
Protected ventilation helps manage condensation, and although the weight is noticeable, the Sentinel feels much more like a weather-focused mountain shelter than a stripped-back ultralight tent.
- Reviewed by Ultralight Outdoor Gear
Features
- Oversize internal mesh storage pouches
- 40D polycarbonate coated nylon floor waterproof to 25,000mm
- Extra tall fabric paneling for weather protection & privacy
- Ultra-Sil LS rainfly fabric delivers 2x less stretch when wet
- AirLift vent
- Tested to 50+mph/80+kmh winds in DAC wind tunnel
- Liveable floorplan - roomy interior fits a rectangular mat
- Hangout Mode for sheltered cooking
Specifications
- Flysheet weighs: 797g
- Inner weighs: 813g
- Poles weigh: 752g
- Total weight: 2362g (excludes pegs & bags)
- Pegs 10 x weigh: 117g
- Floor Area: 3.96m2
- Packed Dimensions: 16.5 x 48cm | Ø6.5 x 18.8 in
- Hydrostatic Head: 25000mm
Material & Construction
- 15/30D Sil/PEU UltraSil LS rainfly fabric, with airfoil vents
- DAC PF 9.5 mm & DAC MX 10.8mm
- 40D polycarbonate coated nylon floor
