Drop 01: Altitude — Only 50 Units.   Claim Founder Access →

SIDELINE
SIDELINE The Shirt — Altitude Flannel Overshirt, full body standing
SIDELINE The Shirt — men's lifestyle editorial, arms crossed
SIDELINE The Shirt — fabric detail, 280 GSM brushed cotton
Fabric Detail

Model is 6'1" — wearing size M · Bronco Blue / Stadium Orange

Detail Photography · Coming Soon

Fabric
Texture
Button
Detail
Pocket
Detail
Collar
Detail
Sleeve
Cuff
Stitch
Detail
Inside
Label
Hem
Finish

Professional photography · F/W 2026 Campaign

Limited First Release · 50 Units

Men's · Drop 01

The Shirt.

Altitude Oversized Flannel Overshirt · Bronco Blue / Stadium Orange

$165 + Free US Shipping

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All sizes available · Moving quickly

Reserve Yours — $165

Made to order · Estimated delivery October 2026

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Shell 100% Cotton — 280 GSM Brushed
Finish Stone-washed, preshrunk
Hardware Gunmetal buttons
Pockets Two chest patch pockets
Origin Made in USA
Construction Double-needle stitching throughout

The heaviest-weight flannel we could source — 280 GSM brushed cotton with a stone-wash finish. Gets better with every wear. Built to outlast every jersey in your closet.

The Shirt is designed with a true oversized fit — dropped shoulders, extended body length, and a relaxed chest. It reads as intentional streetwear-adjacent styling, not just a big shirt.

Wear it open as a layer over a white tee, or button all the way up for a cleaner editorial look. The shirt-tail hem is designed to be worn untucked.

Shoulders

Dropped

Body

Extended

Hem

Shirt-tail

  • Machine wash cold · 30°C / 86°F, gentle cycle
  • Tumble dry low · Remove while slightly damp to prevent over-shrinking
  • Do not bleach · Use mild, color-safe detergent
  • Iron on warm · Iron reverse side only
  • Dry clean safe · Preferred for preserving the stone-wash finish
Estimated Delivery October 2026
US Shipping Free
International Calculated at checkout
Carrier UPS / FedEx signature required

Drop 01 is made to order. Production begins after the reservation window closes. You'll receive email confirmation with your production slot and tracking number.

  • 30-day return window from delivery date
  • Free size exchanges — one exchange per order
  • Items must be unworn, unwashed, with tags attached
  • Final sale items are not eligible for return
  • Email hello@thesidelineco.com to initiate
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30-Day Returns
Made in USA