The best-selling plus size waterproof trousers for women who don't stop for rain — now in three-layer stretch performance fabric, in sizes UK 18 to 30.
Whether you're hiking a muddy ridge, cycling through a downpour, or setting up camp in a British drizzle, the Outdoor Research Aspire 3L Rain Pants are built to keep you dry, comfortable, and moving freely — in a fit that actually works for plus size bodies.
Made with OR's proprietary AscentShell™ Dry technology — a 100% recycled nylon three-layer shell with Nikwax Direct.Dry DWR — these are the most breathable, waterproof, and sustainable rain trousers we stock. They're also the first carbon-neutral certified technical apparel in the outdoor industry.
Why plus size women love the Aspire 3L Rain Pants
Finding waterproof over-trousers that genuinely fit a plus size figure has always been a challenge. The Aspire 3L changes that. With a gusseted crotch, articulated knees, and mechanical stretch throughout, these trousers move with your body — not against it. The elastic waist with drawcord gives a secure, adjustable fit, and the 3/4-length side zippers mean you can pull them on and off over walking boots without a struggle.
If you run warm on the trail, the thigh-high zip doubles as a vent to regulate your temperature. And when the sun finally breaks through? They stuff into their own back pocket and clip to your pack via the carabiner loop.
Fabric performance
- Waterproof — fully seam-taped with YKK® Aquaguard® zippers
- Windproof — blocks wind chill on exposed ridges and open roads
- Breathable — sweat vapour escapes while rain stays out
- Mechanical stretch — unrestricted movement for hiking, cycling, and scrambling
- Lightweight — packable enough for day hikes and multi-day trips
- Sustainable — carbon-neutral certified, made from 100% recycled nylon
Design features
- YKK® Aquaguard® zippers throughout
- 3/4-length side zippers — easy on/off over boots
- Back pocket doubles as stuff sack
- Carabiner loop for clipping to pack or harness
- Internal instep lace loops
- Articulated knees for natural movement
- Elastic waist with drawcord
- Gusseted crotch for unrestricted stride
Fit and sizing
Available in 1X, 2X, 3X, and 4X — equivalent to UK sizes 18 to 30. Standard fit with room to layer underneath. Measure yourself and compare to the size chart at the bottom of the page for the best fit.
The most size-inclusive performance rain trousers available in the UK — and the most sustainable we've ever stocked.
