Fully waterproof trousers that weigh 163g. The Outdoor Research Men's Helium UL Pant is built for fast-and-light hiking and unpredictable weather: ultralight, waterproof protection for minimalists who move quickly in the mountains.

The shell is Toray Dermizax™ 2.75-layer construction over 100% nylon 15D ripstop at just 61g/m², fully seam-taped so it's waterproof, windproof and breathable when the wind and rain arrive together. Despite the weight it's a durable ripstop rather than a throwaway emergency layer. Ankle zips get them on over boots, elastic cuffs with gripper tape and lace loops keep them in place, and a gusseted crotch and elastic drawcord waistband keep them comfortable on the move. The back pocket doubles as a stuff sack.

Choose the Helium UL when every gram counts and you still want proper waterproof trousers in the pack, not just a hope that it stays dry.

Why you'll love it

• Fully waterproof, windproof and breathable – Toray Dermizax™ 2.75-layer, fully seam-taped
• Ultralight yet durable – 15D ripstop nylon shell at 163g
• Packs into its own pocket – the back pocket doubles as a stuff sack
• Easy on over boots – ankle zips, gripper-tape cuffs and lace loops

Good to know

• Weight: 163g (5.75 oz)
• Material: Toray Dermizax™ 2.75-layer, 100% nylon 15D ripstop (61g/m²), fully seam-taped
• Gusseted crotch and elastic drawcord waistband
• Reflective logos for visibility
• Colour: Black
• The Helium UL Pant is made in XS to XXXL in Short and Regular lengths

Who it's for

Fast-and-light hikers, trail runners and travellers at any level who want ultralight waterproof trousers for changeable weather or as an emergency layer.