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 42 reviews
Brendan McPartland
Super Comfortable, great DWR

Look great. Wore them all day traveling to Mexico and then kept them on for exploring/adventure in the rain that night - hiking, zip lining, and even some incidental swimming. Water resistance was excellent in the tropical rain. Not much you can do about full on swimming, but they still dried very quickly. Cleaned them up in the hotel sink and wore em to dinner the next night.


Perfect for all kinds of temps and activities. Not being restrictive I've used for trail runs, layered under waders hunting, and gym workouts. Great product.

James Wells
Awesomer Pants!

Just received the Avid Ultralight K4 pants and went climbing in them today, very comfortable and durable. I am 6'3" and the regulars were plenty for me so definitely run long but I am very happy with them so far! I will be ordering more soon!

Mason Huston
Avid Ultralight K4 Pants

Let me start off by saying Beyond Clothing is an amazing brand. I now own a few different products of theirs. These pants though are absolutely a great bang for your buck! I am very particular when it comes to clothing and I will be purchasing some other articles of clothing to compliment what I currently have. Thanks guys.

Rick Higgins
Good overall pant

Happy with these pants. Nice material. A bit heavier than I expected but very nice overall.

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
Body 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

System Builder

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