Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant
Men's Avid Ultralight K4 Pant

Men's Avid Ultralight K4 Pant



Rustic Green
Manatee Grey
Fit: Standard
Size & Fit Guide

This is a clearance item. All sales are final.



Beyond System Layer 4


Ultralightweight, Highly Flexible, Treated for Comfort, Designed for Layering

Performance Fit

Low-profile design with an elastic waistband and tapered cuffs improves mobility and ease of layering.


Ultralightweight softshell and a streamlined fit combine to ensure easy stowing when not in use.

Double-Treated Fabric

Clear outer shell coating softens hand feel, and a DWR finish provides weather-resistant protection.

Multi-Season Versatility

The Men’s Avid Ultralight K4 Pant is a streamlined alternative to the Ventum Ultralight K4 Pant, designed for active, multi-season use and with increased ease of layering under additional protection. The trim, tapered profile and ultralightweight fabric ensure easy mobility and layering, and wind-resistant protection wards off chilling gusts while retaining warmth generated from activity.

Built for Versatility

Ultralightweight, quick-drying fabric with 4-way stretch combines with articulated knees to provide versatile performance as both a layer and a standalone jogger. A dry clear coating offers a softer hand feel, and a hidden passport pocket and key clip add convenience to everyday use and adventuring alike.

The Avid Ultralight K4 Pant is crafted with bluesign®-certified textiles—verified for ecological safety at every step of manufacturing—and is certified STANDARD 100 by OEKO-TEX® as free from harmful levels of more than 100 substances.

Bulk-Free Profile

Low-profile construction with tapered cuffs and an elastic waistband delivers a trim fit, allowing comfortable layering beneath additional protection without bulk or bunching up. Combined with air-sealing softshell performance, the Avid is an ideal midlayer for extreme cold environments.

Air-Sealing Softshell

The wind-resistant softshell seals out chilling gusts while retaining warmth built up from active use, ideal for active use in cold to temperate weather or as a midlayer in extreme cold environments. A durable water-repellent (DWR) finish helps light precipitation bead up and roll off.


Technical Features

  • Ultralightweight
  • Wind resistant
  • Water resistant
  • 4-way stretch
  • Highly compressible
  • Fast drying

Fit & Design Details

  • Elastic drawcord waistband delivers snug, adjustable fit ideal for standalone or layered use
  • Tapered cuffs reduce layering bulk, help seal in heat from active use, and ensure visibility of feet during adventures
  • Articulated knees
  • Hidden zippered fly

Fabric Treatment

  • DWR (Durable Water Repellent) finish repels moisture
  • Clear coating on the outer shell increases the soft hand feel

Pocket Details

  • Two hand pockets
  • Two zippered rear pockets
  • Internal zippered passport pocket in right hand pocket
  • Key clip in left hand pocket


  • 86% nylon/14% spandex shell combines ultralightweight with 4-way stretch for exceptional mobility
  • Weight (Size L): 12.77 oz
  • Imported | TAA Compliant


  • Insulation is crafted from 100% post-consumer recycled content and is completely biodegradable
  • Certified STANDARD 100 by OEKO-TEX® | confirmed free from harmful levels of more than 100 substances
  • bluesign®-certified textiles have been verified for ecological safety at every step of manufacturing

Trade Agreements Act Compliant
Designed in Seattle. Imported.

Customer Reviews

Based on 24 reviews
Jon McColgan
These pants are great!

This is my first purchase form Beyond and will not be my last! These pants are very well made and very comfortable. The material has the perfect amount of stretch and is very lightweight. I can see myself wearing these all the time. I really like the zippered pockets. The zippers are good quality and you can tell they should last a long time. I am 5'10" 180lbs and the medium fits perfectly. Not to snug and by no means too loose. I look forward to trying out more clothing items from Beyond!

Andrew Lawton
Best pants i own

The only pair of pants I own that fit perfectly. Going buy more as soon as i finish this review.

Christian Mason
Great pant

These are incredibly comfortable and steam lined. Great for running in brisk temperature with the tapered legs. Also good for Alpine climbing. I highly recommend. Be sure to check out the sizing guide. Very pleased with my purchase....will be buying another pair.

Paul Bowen
Where have these been hiding?

Good cuts and stitches in the right places. I was looking for an athletic winter trousers for my weekly Murph on the weekends. I’m a shorter guy and having the appropriate length is important. I literally cut the off tag and went for a mile run. I’m considering a lighter color for the Mediterranean this summer and my hope that option will be available. I normally carry a pocket knife in my back pocket but the front pocket channel controls the sway on the knife while walking or running. I’m not disappointed and looking forward to a long sweaty happy summer.

Joe B
Excellent pants

This is my first time purchasing these pants and I was very pleased. They are extremely comfortable and lightweight. I had no issues carrying my normal "gear" and found the pants to be very versatile. I'm definitely a long-term customer if everything is made this well.

Need Help? Contact us with any size or fit questions. 206-767-0307

Men's Avid Ultralight K4 PantSizing Information

Height 5' 8" - 6' 2"

Short: -2 Inches Inseam

Long: +2 Inches Inseam

SizeWaistHipInseam Regular
Measurements in Inches

Waist Preferred Pant Waist

Hip 7" Below Preferred Waist

Inseam Regular Crotch to floor

silhouette diagram

Fit Information

Standard True to Size | Active Layering

silhouette diagram
Product is Standard Fit, developed to accommodate up to two layers, for cross-environmental versatility

Expedition Oversized | Static Layering

silhouette diagram
Product is Expedition Fit, developed to accommodate up to four layers, for extensive use in extreme weather

Learn more about our layering systems

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