Rab DAS Light Insulated Pants

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Patagonia’s DAS Light Pants offer warmth and packability for mountaineers. The PlumaFill synthetic insulation mimics a down loft while maintaining warmth when wet. The pants have a weather-resistant face fabric and an internal quilting construction to maximise loft and warmth.

Patagonia says: 

For belaying in the spindrift and stormy bivies, the DAS® Light Pants are packable, ultralight and built to move. With PlumaFill synthetic insulation that’s warm even when wet, a recycled nylon shell with a weatherproof PU coating and full side zips for easy on-off, they’re a must-have for long, committing alpine climbs where every gram counts. Made in a Fair Trade Certified™ factory.

Our Verdict

For weight-conscious mountaineers who need an insulated layering piece for bitter bivies and belays, Patagonia’s DAS Light Pants provide impressive warmth for the incredibly low weight. These minimalist insulated pants pack down tiny yet insulate effectively even when wet.

The key is Patagonia’s innovative PlumaFill synthetic insulation, which mimics the lightweight loft of down clusters while maintaining warmth when exposed to moisture. This continuous insulation is sandwiched between a thin 10D recycled nylon face fabric treated with a weather-resistant finish.

An internal quilting construction maximises the lofting and warmth of the PlumaFill with minimal stitching. The DAS Lights should breathe reasonably well for an insulated layer despite having no zippers or vents.

The full-length side zips allow easy on/off over boots and crampons, while elastic cuffs and an adjustable waistband provide a solid fit. They deliver outstanding warmth for their packable weight and volume.

– Reviewed by Ultralight Outdoor Gear

(Unfortunately, we are unable to ship Patagonia products outside of the European Area (defined as the European Economic Area plus Switzerland and the UK)

Features

• Super-packable must-have for mountain routes: Ultralight 100% recycled nylon ripstop face fabric has a water-resistant endurance coating for improved weather protection
• Revolutionary lightweight 100% recycled polyester PlumaFill insulation replicates the structure of down in a continuous synthetic insulation material, offering the warmth and packability of down but with the warm-when-wet performance of synthetic insulation
• Leg warmth maximized by pairing a weather-resistant hung face fabric with internal, innovative quilting construction to stabilize and maximize the loft of the PlumaFill strands with minimal stitching
• Elasticated waistband secures with snaps; full-length zippers for easy on and off while wearing boots and crampons; elastic cuffs hold pants in place over mountain or touring boots
• Zip fly secures with snap; built to fit over shells and harness
• Made in a Fair Trade Certified™ factory, which means the people who made this product earned a premium for their labour

Specifications

• Small weighs: 308g
• Medium weighs: 317g
• Large weighs: 321g
• XLarge weighs: 333g

Material & Construction

• Shell: 0.8-oz 10-denier Pertex® Quantum Pro 100% recycled nylon ripstop with a PU dry coating and a PFC-free DWR finish (durable water repellent coating that does not contain perfluorinated chemicals).
• Lining: 0.8-oz 10-denier Pertex® Quantum 100% recycled nylon ripstop with a PFC-free DWR finish.
• Insulation: 65-g PlumaFill 100% recycled polyester. Lining fabric is certified as bluesign® approved.
• Made in a Fair Trade Certified™ factory

Help & advice:

• Recycled Content in Outdoor Gear
• Why is ‘PFC Free’ Important?
• What is Bluesign?
• PERTEX Fabrics Overview
• What is PERTEX Quantum Pro?