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How to Sew the Ultimate Racerback Tank Top with a Built-In Bra (Free Video Tutorial!)
If you’ve ever tried sewing your own athletic wear or loungewear, you know the struggle: finding a tank top pattern that offers real support without looking clunky or feeling restrictive. Most basic knit tank patterns leave you wondering what kind of bra you’re supposed to wear underneath, especially with a cut-out racerback shape.
Enter the "Frances" Racerback Tank Top Pattern with Removable Bra Top from KeeperHK.
Whether you’re heading to a yoga class, running weekend errands, or just looking for a cute, comfortable staple top to add to your handmade wardrobe, this project checks every box.
Why You’ll Love the "Frances" Racerback Tank Top with a Built-In Bra Pattern
This isn't just another basic rib racer tank top pattern. It was thoughtfully designed to blend functionality, comfort, and style into one quick, satisfying sew.
1. Built-In Support with Removable Bra Pads
The secret to this tank top is its clever inner construction. The upper half is lined with soft, stretchy jersey fabric that includes discrete bra pad pockets. You get all the light-to-medium support of a sports bra without having to wear two separate garments. Prefer a completely unpadded, ultra-relaxed fit? Simply slip the bra cups out!
2. Custom Neckline Options
Everyone has a personal preference when it comes to necklines. The Frances Racerback Tank Top with a Built-In Bra pattern includes two different neckline variations right out of the box:
Lower Round Neck: Flattering, open, and perfect for casual everyday wear or layering.
Higher Round Neck: A bit more modest and secure, ideal for active movements and workouts.
3. Beginner-Friendly & Fast to Sew
If knit fabrics make you nervous, this pattern is the perfect confidence booster. It comes with clear assembly instructions and a step-by-step video tutorial to guide you through every stitch—from setting the inner lining to finishing the edges smoothly.
Video tutorial on YouTube:
Pattern Quick Specs & Details
Format: Instant Digital PDF Download (Print at home in A4 or US Letter, or take the A0 file to a copyshop).
Size Range: Multi-size download covering UK 4–22 / EU 32–50 / US 1–18 (Designed for height 162–178 cm / 64–70 inches).
Seam Allowance: Included in all pattern pieces—no tedious adding required!
Level: Confident Beginner.
Video Tutorial: Watch the step-by-step tutorial on YouTube: KeeperHK Racerback Tank Tutorial.
Recommended Fabric & Tools
To get that store-bought fit and stretch recovery, choosing the right fabric is key:
Main Fabric: Ribbed jersey knit, cotton spandex, bamboo rayon knit, or lightweight athletic jersey (at least 50% four-way stretch works best).
Lining Fabric: A soft, lightweight stretch jersey for the inner lining and bra pocket.
Notions: Removable foam bra inserts/cups.
Tools: A standard sewing machine equipped with a stretch/ballpoint needle and a stretch stitch function (zigzag, lightning, or triple stitch). A serger/overlocker is optional but creates great professional seams!
Ready to Sew Your New Favorite Tank?
Upgrading your handmade wardrobe with activewear basics doesn't have to be complicated. The Frances Racerback Tank Top PDF Pattern gives you professional results on a beginner friendly timeline.
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