first Relaxed Fit NEW Relaxed Fit NEW
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
first Relaxed Fit NEW
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
Killam PX
Relaxed Fit NEW

Killam PX

Regular price Sale

The Killam PX is our all-around running pant for both trail and road runs. We developed the Killam for grueling ultra runs. It is also great to run shorter distances and to lounge around in. 

The pant has a relaxed upper body fit with tapered legs and includes ankle zips.

For the best performance, pair with our base liners.

Separate Shorts & Base liner system

For the best performance, pair with one of our base liners.



The flex is in the spiral yarn. This configuration gives the fabric a built-in mechanical stretch that goes to all 360 degrees of adventure. Thanks to this technology, the fabric will stretch and recover without using heavier water-absorbing elastics like Spandex. Upshot: outstanding breathability, abrasion resistance and a softer feel against your skin. All this at 40% the weight of the old school stretchy stuff. PrimeFlex is both eco and techno. The fabric is partially made from a corn-based material that uses less water during processing. There’s comfort from mile one to mile one hundred.


Tripure is a high tech nano fiber that delivers incredible comfort and performance. The Benchmarks are superior stretch and recovery and fined-tuned temperature regulation. Dries quickly, anti-microbial, static free and durable beyond all normal expectations. The humble waistband gets its 15 minutes of athletic fame.


  • Toray Prime Flex fabric 100% polyester with mechanical stretch. Lightweight, durable, DWR coating, quick dry, breathable
  • 5 YKK secure zip pockets
  • The center back pocket accommodates phone sizes up to 5.78 inches x 2.82 inches (147mm x 72mm). Fits iPhone 12, 12 Pro, 13, 13 Pro with slim case.
  • Two small back side pockets for balanced weight distribution
  • Two front zip hand pockets for additional storage and balanced weight distribution
  • Internal front right key pocket. This will keep your key secure and away from your 5 run pockets
  • Tripure elastic waistband. Anti-microbial, durable, quick dry, temperature regulating
  • Exterior draw cord for maximum comfort
  • Relaxed fit upper body with tapered leg
  • Two YKK zip bottom openings to facilitate ease of taking on and off
  • 29” inseam on size medium
  • Soft touch stitching for a chafe free wear
  • Reflective logos
  • Layer with Tahoe or Shasta base liners for the best PATH experience
  • Weight: 8.9 oz / 252 g (Size MD)

The most innovative fabrics and highest performance material

60 day returns

100% direct to consumer model without the retail mark up

The Killam PX is our all around running pant for both trail and road runs.

Plenty of pocket space

Killam PX Pant - Front

  1. Two front hand pockets

Killam PX Pant - Back

  1. Center back phone pocket
  2. Two small back side pockets
  3. Internal key pocket

The finest running shorts you'll ever experience

Highest performance fabrics and materials


Field tested

The Killam PX pant is a fantastic all around pant. Designed to be a top performer, whether you are running 2 or 200 miles.

Customer reviews