Burton Men's [ak] Baker Ultralight Down Jacket

Summit-Grade Insulation. Featherweight Packability & High-Loft RSD Down.

Designed for freezing summit ridge transitions, frigid chairlift rides, and severe alpine cold, the Burton Men’s [ak] Baker Ultralight Down Jacket delivers unmatched thermal efficiency, minimal weight, and high-loft packability. Benefiting from the season's overall focus on refined backcountry mobility, this technical insulator pairs a buttery-soft Pertex® 20D nylon ripstop shell with high-loft 800-fill Responsibly Sourced Down (RSD). It provides maximum warmth-to-weight performance while compressing effortlessly into its own chest or hand pocket when you're back on the move.

• 800-Fill RSD Down Insulation: High-loft, ethically sourced goose down creates an incredible thermal barrier against sub-zero temperatures without adding heavy bulk.

• Pertex® 20D Nylon Ripstop Shell: Down-proof, ultra-durable face fabric treated with a PFAS-free DWR coating to shed light snow, spindrift, and mountain moisture.

• Integrated Pit Zip™ Venting: Rare for an ultralight down jacket, mesh-lined armpit vents allow you to dump heat instantly during high-output bootpacks or quick transitions.

• Packable Self-Stowing Pocket: Compresses down tiny into its own left handwarmer pocket, taking up minimal footprint inside your touring or backcountry backpack.

• Streamlined Layering Silhouette: Cut to fit cleanly underneath 2-layer and 3-layer GORE-TEX shells without restricting shoulder movement or arm mobility.

• Rider-Driven Technical Features: Fitted contour hood with stretch binding, drawcord hem cinch, elasticized cuffs, zippered chest pocket, and microfleece-lined handwarmer pockets.

Pro Tip: Down vs. Synthetic Insulators in the Backcountry The choice between down and synthetic comes down to moisture management vs. ultimate warmth-to-weight ratio:

• Choose High-Loft Down (e.g., [ak] Baker 800-Fill) for extreme sub-zero cold, dry conditions, and compact packing. Down provides unmatched thermal efficiency per gram and compresses into a fraction of the space in your touring pack—making it the ultimate summit layer during cold ridge transitions or emergency shelter setups.

• Choose Active Synthetic (e.g., [ak] Helium Thermacore Stretch) when you are actively moving and sweating on high-effort uptracks or riding aggressively in bounds. Synthetic insulation handles humidity and perspiration without collapsing, dries rapidly, and continues to trap heat even if damp.

The Backcountry Setup: Many riders pack a highly breathable synthetic layer on their body for the uptrack and keep an ultralight down jacket compressed at the bottom of their pack to throw over everything the moment they hit the summit or transition to descending.