Mens Downvalley Overshirt-Button Up Shirts-Free Fly-Black-Mountain Sports
Free Fly

Men's Downvalley Overshirt

Quilted warmth with Free Fly's signature softness

$74
Color: Black
Size:
Size guide
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Top features
Quilted Warmth
Buttery-Soft Lyocell Blend
Mid- or Outer-Layer Versatility
Description

Our Downvalley Overshirt is a versatile mid- or outer-layer that you’ll want to wear just about everywhere. Quilted for warmth and blended with lyocell for our signature softness, the double-knit fabrication combines durability and understated style for comfort in cool temps. Whether you’re scoping waves on a chilly morning, exploring dirt roads en route to your favorite campsite, or crabbing with the family, this overshirt is the right tool for the job.

Perfect for
Camping
Basecamp comfort.
On the water
Sun & salt.
Travel
Flights & road trips.
All-season
Temp regulation.
Features
  • Quilted Warmth. Quilted, double-knit construction traps warmth for chilly mornings and cool evenings.
  • Buttery-Soft Lyocell Blend. A touch of lyocell gives this performance knit Free Fly's signature buttery-soft handfeel.
  • Mid- or Outer-Layer Versatility. Wear it over a tee on mild days or under a shell when the weather turns.
  • Pockets for the Essentials. A left chest pocket plus hand pockets keep keys, phone, and wallet close.
Materials
  • 94% Polyester / 6% Lyocell.
About the brand

Free Fly started with a love of the water and a mission to make natural, breathable clothing that keeps up. Their bamboo-based fabrics are buttery soft and built for comfort from sunrise paddle to sunset hang. At Mountain Sports, we love Free Fly because it’s made for life lived outside — easygoing, effortless, and always adventure-ready.

Shop all Free Fly

SKU MDOWVOV-300-XXL
Size guide

Free Fly Size Chart - Men's Apparel

Free Fly Sizing Chart

All measurements are in inches and reflect body measurements. If you are in between sizes, size up for comfort.

Men's Size Guide (Men's Apparel - single chart for tops and bottoms):

Alpha Sizes Numeric Sizes Chest Waist Hip Sleeve
S 30–31 36–38 30–32 34–37 32–33
M 32–33 38–40 32–34 37–39 33–34
L 34–35 41–43 35–37 40–42 34–35
XL 36–38 44–46 38–40 43–45 35–36
XXL 40 47–49 41–43 46–48 36–37
3XL 50–52 44–46 49–51 36–37

Numeric Sizes are waist equivalents. How to measure: Chest - circumference at the widest part of the chest, about 1" down from armpit; Sleeve - with arm slightly bent, from center back neck to shoulder, down arm to wrist bone; True Waist - around the natural waist, narrowest part of the torso; Hip - around the fullest part of the hips. Inseam length is listed on each product page.
Performance

How it ranks across conditions.

Calibrated against comparable products we stock, so you can compare like for like.

Softness

Standard
Soft
Buttery-soft

Free Fly's signature buttery handfeel

Breathability

Low
Moderate
High

Breathable everyday weight

Quick-dry

Slow
Moderate
Fast

Poly blend dries quickly

Best for

Is this right for you?

Chilly mornings

Quilted double-knit warmth for wave checks and campsite coffee.

Not for: Need a lighter layer for mild evenings. Try the Bamboo Flex Henley

Road trips & camp

Mid- or outer-layer with hand pockets for keys and phone.

Not for: Just need a casual long sleeve, not a layering piece. Try the Mellow Meadow Long Sleeve

Full spec sheet

Technical Specs

Fabric94% polyester / 6% lyocell, quilted double-knit
Fabric weight275 GSM
FitRelaxed through the body
PocketsLeft chest pocket + hand pockets
SizesSM–2XL
CareMachine wash cold with like colors, tumble dry low
Questions, answered

Before you buy.

Pulled from chats, emails and store visits. The things people actually ask us before they buy. Don't see yours?

Ask a question
Is the Downvalley warm enough on its own?

It's built as a mid- or outer-layer for cool temps — great solo over a tee on chilly mornings at the beach or campsite. When the weather turns truly cold or wet, layer it under a shell.

How does Free Fly sizing run?

Free Fly tops generally run true to size with an easygoing, classic fit. If you're between sizes, size up for a more relaxed look or down for a trimmer fit — and check the size guide on this page for exact measurements.

How should I care for this shirt?

Machine wash cold with like colors and tumble dry low. Skip bleach and fabric softener to protect the fabric and keep the fit true.

Real people, always

Our story

Someone who's been there

Ask about a trail, a tent or a fit, and a person who uses the gear writes back.

Picked, not just stocked

We carry the brands we trust on our own weekends outside.

Easy if it's not right

Free 30-day returns, and help finding the one that is.

Free shipping over $150

Shipped nationwide since '96. Some exclusions apply.