DROP 01:
ALTITUDE
Premium Sports-Lifestyle Flannel · Made-to-Order · 50 Units
"For the fan who outgrew the jersey
but never left the culture."
Founder Spots Remaining
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No payment required · You'll be first to preorder
WHY WE
BUILT THIS
Every sports fan knows that feeling — you love the game, the team, the culture. But you've outgrown the oversized jersey. You want to rep your team, your energy, your identity — just at a different level.
SIDELINE was built for that moment. We took the flannel — the quintessential American game-day fabric — and elevated it. Oversized silhouettes inspired by today's streetwear. Color palettes drawn directly from iconic team identities. Craftsmanship that holds up whether you're in the stadium or the street.
DROP 01: ALTITUDE is the proof of concept. 50 units. Made-to-order. No excess. If it sells, we build more. If it doesn't, we learn. Either way, the people on this list shaped what comes next.
FOUNDER ACCESS
EXPLAINED
Join the List
Fill out the Founder Access form below. No payment. No commitment. Just your spot in line — secured.
Founder Preview
In July 2026, you get a full preview email: campaign imagery, complete specs, sizing guide, and exact pricing — before anyone else sees it.
72-Hour Window
On August 1, your exclusive 72-hour preorder window opens. When the 50 units are gone, the window closes — no exceptions.
WHY WE BUILD THIS WAY
We don't pre-manufacture inventory. We don't guess what will sell. Every unit in DROP 01 is built because a real person committed to it. That's how you get quality that actually means something — and how we avoid contributing to the waste cycle that plagues fashion.
FOUNDER
BENEFITS
Being a Founder isn't just about getting first access. It's about being part of something from the beginning.
First Production Run
Your piece is built in the very first production batch — ensuring the highest quality and earliest delivery.
Founder Recognition
Founding members are recognized in the brand's history. You shaped what SIDELINE became from day one.
Priority Shipping
Founder orders ship before any general release inventory, no matter how many units are produced in future drops.
Early Access — Drop 02
When Drop 02 is announced, Founders get 48 hours of exclusive access before the window opens to the public.
Founder-Only Pricing
Future drops may come at a higher price point. Your Founder status locks in a loyalty discount on every future SIDELINE release.
More Coming
We're building exclusive Founder perks as the brand grows. Collaborations, private events, and things we haven't announced yet.
THE
FOUNDER'S LETTER
To Our First 50,
I started SIDELINE because I love sports culture — but as I got older, I found myself wearing jerseys less often. Not because the passion faded. The passion never fades. But I wanted apparel that carried the same energy in a more elevated way.
I wanted to walk into a room wearing something that told the story of who I am — someone who grew up on game days, who still gets that feeling when the team takes the field — without looking like I raided a souvenir shop.
That's the gap SIDELINE is built to fill.
This first collection is intentionally small because I'd rather build something meaningful than chase volume. 50 units. Made to order. No shortcuts. No excess. Every piece is built because a real person committed to it.
Thank you for believing in SIDELINE from the very beginning. You're not just buying a flannel — you're betting on something. I don't take that lightly.
The Founder
SIDELINE · Denver, Colorado
DROP 01
ROADMAP
FOUNDER ACCESS OPEN
Waitlist is live. Founder spots are filling. Join now to guarantee your 72-hour window.
FOUNDER PREVIEW DROP
Every Founder gets a private email: full campaign imagery, complete product specs, exact pricing, and your sizing guide.
PREORDER WINDOW OPENS
72-hour exclusive window for Founders only. 50 units available. No extensions. Payment collected at preorder.
WINDOW CLOSES
The preorder closes — or sells out sooner. Production begins on exactly what was ordered. Nothing more.
PRODUCTION
Each piece made-to-order in the USA. No shortcuts. No overcrowding our partners with excess.
DELIVERY
Your piece arrives. No warehouse delays. No cancellations. You ordered it; we built it for you.
BUILT TO
LAST
First & Limited Release
DROP 01: ALTITUDE is SIDELINE's inaugural production run. 50 units only. Made-to-order. Once this drop is archived, these exact pieces will never be reproduced. This is your one window.
Fabric & Construction
Sizing & Fit
Women's — The Dress
Relaxed shirt-dress silhouette. Falls mid-thigh. Belted at waist.
Model is 5'8", wearing size S
Men's — The Shirt
Oversized relaxed fit. Dropped shoulder. Extended hem. True to an oversized cut — size down if you prefer a regular fit.
Model is 6'1", wearing size M
Full size guide (measurements in inches + cm) will be included in your Founder Preview email in July 2026.
Care Instructions
Flannel softens and improves with each wash. This piece is built to be worn, washed, and worn again for years.
Delivery & Policy
Estimated Delivery
October 2026 — shipped after production completes
Shipping
Free standard shipping on all US orders. International available at checkout.
Returns
30-day returns on unworn items in original condition. Made-to-order pieces may have a restocking fee.
Exchanges
Size exchanges honored within 30 days of delivery, subject to availability.
FOUNDER
ACCESS FORM
No payment. No obligation. When your 72-hour window opens on August 1, you'll be first to know.
FREQUENTLY
ASKED
Limited · 50 Spots Total
Become a Founder
Join the first 50 people to own SIDELINE. Founders get exclusive access before anyone else.
- 24-hour early access to every future drop
- Founder-only updates and behind-the-scenes
- Early product announcements before the public
You're In
No payment required. You'll get an email with your Founder number.