MicroTherm™ Down Shirtclearance

The lightest down layer in our long history, the MicroTherm™ Down Shirt is the ideal weight for packing or using as a mid, last or emergency layer—and we've updated the fit for 2012 with a little more room through the chest for added comfort and better range of motion. The 800 fill Premium European Goose Down insulation traps core heat, while a lightweight nylon ripstop shell treated with StormRepel® DWR finish sheds light precipitation and snow.

Unbelievable
"I live in Iceland and I love, love, love this shirt! It can be worn by itself or with a windbreaker and is absolutely the best. It looks great and is so comfortable - a great shirt!"
toastywarminiceland

• WATER-REPELLENT RIPSTOP SHELLLightweight 1.2 oz 20-denier ripstop nylon with Stormrepel™ DWR finish
• 800 FILL POWER PREMIUM EUROPEAN GOOSE DOWNDown-packed micro-channels keep you warm with minimal weight and bulk
• INTEGRATED STRETCH PANELSIncrease breathability and improve range of motion
• LIGHTWEIGHT AND PACKABLEStows easily in small spaces

Active Fit: Garment fits closer to the body; designed to fit over baselayers and light midlayers

• LOW-PROFILE POCKETSLightweight invisible zippers keep items secure
• ELASTICIZED CUFFSSeal in heat
• PACKS INTO ITS OWN POCKETInterior carabiner clip-in loop

• 100% nylon shell; 95% polyester/5% spandex stretch panels; 800 fill down insulation
• Center back length: Reg. 24.5", Petite 23.5", Tall 26"
• Garment weight: 9 oz
• Imported
• Machine wash

MicroTherm™ Down

MicroTherm is First Ascent's lightest, warmest down construction, which pairs high quality 800 fill with some of the narrowest channel baffling in the outdoor industry.

The narrow-channel construction prevents down migration and keeps the fill more evenly distributed throughout the garment—minimizing the cold spots and filling voids that could allow body heat to escape.

This elevates the overall thermal value of MicroTherm™ to an extremely high degree, meaning more warmth for the same weight, reducing overall bulk and allowing for easier layering as well as greater packability.

We like to emphasize it's the warmest, lightest down we've ever made.

StormRepel®

Our durable water-repellent (DWR) finish causes moisture to bead up on the surface so it rolls off or evaporates rather than soaking into the fabric.