The Chamonix Color Block Sweatsuit Free Sewing Pattern

Meet the Chamonix Color Block Sweatsuit, where effortless comfort meets elevated, snow day style. Designed with a modern silhouette and thoughtful details, this set transforms everyday loungewear into something truly special.

Crafted from soft and plush bamboo stretch French terry in the sophisticated shades Gray Flint and Marine, The Chamonix Sweatsuit feels as luxurious as it looks. And if bold is more your vibe, check out the rest of the shades in Mood’s Exclusive Emei Collection of French Terry fabric.

The sweatpants feature sleek envelope pockets hidden discreetly in the side seams, keeping the lines clean while remaining perfectly practical. A cozy, thick elastic waistband ensures all-day comfort and a flattering fit. The top brings relaxed drama with its slouchy, off-the-shoulder silhouette and striking diagonal seam that highlights the contrast between colors. Planning to wear it out and about? Add the optional, removable shoulder strap for a secure fit that keeps up with your day.

Designed as an easy, make-it-in-a-day project with a few slightly intermediate details, Chamonix is ideal for the ambitious beginner ready to level up their sewing skills.

What’s stopping you from creating your next versatile, elevated loungewear set?

Essential Materials & Sizing Guide for the Chamonix Color Block Sweatsuit

Continue reading for a breakdown of what knowledge and materials you need for creating your very own color block sweatsuit! We’ve got you covered with the recommended materials we used—if you want to follow along exactly—as well as a curated list of alternative fabric type recommendations if you want to customize your own version. The Chamonix Color Block Sweatsuit free sewing pattern download includes technical drawings for seam and silhouette visibility, plus a size chart to help you find your perfect fit!

Purchase Products Used Below:

Quantities indicated are for sewing a size small* color block sweatsuit. Toggle the ‘SHOP THIS LOOK’ box to find quantity estimates for other sizes.

• 2.5 yards of Bamboo Stretch French Terry – Grey Flint – Emei Collection
• 2.5 yards of Bamboo Stretch French Terry – Marine – Emei Collection
• 1 yard of White Elastic – 2″
• 1 each of Gutermann Sew All Thread 500m – 102 Light Grey
• 1 each of Gutermann Sew All Thread 100m – 278 Midnight
• 1 each of Prym Hooks & Eyes – Silver Size 2 – 12 Sets
• MDF511 – Chamonix Color Block Sweatsuit Sewing Pattern (Free download below!)

*Quick Tip! The ‘SHOP THIS LOOK’ box defaults to full-yard quantities. To order an exact half-yard quantity for any fabric, simply use the decrease quantity button (-) to subtract by the half yard. Then click “ADD TO CART” to add all materials to your cart. (Our system can only display full-yard quantities initially.)

Alternative Fabric Type Recommendations:

The Chamonix Color Block Sweatsuit sewing pattern is best suited for medium to heavyweight fashion fabrics. Explore other fabric types or colors from our featured collections for your color block sweatsuit with the links below.

• Fleece
• Flannel
• Velour

Fabric Collections Used in this Post:

• The Emei Collection

Download Your Free Sewing Pattern

Submit your name and email in the form below to receive the download link for the Chamonix Color Block Sweatsuit free sewing pattern directly in your inbox. Mood Sewciety Patterns will send your free download link via email with the subject line: ‘Your Free Download from Mood Sewciety – The Chamonix Color Block Sweatsuit’ (in PDF format for A4 and letter-size printing).

© MoodFabrics.com / MoodSewciety.com – Mass production, resale, or distribution of this pattern in any form is strictly prohibited.

Find Your Perfect Fit

The Chamonix Color Block Sweatsuit Sizing Guide is based on the suggested design & wearing ease for this style. You can also choose the size according to your desired finished garment measurements, blending between sizes as needed. Measure the printed patterns to make sure the dimensions are according to the desired fitting and adjust if needed before cutting the fabric. For best results, sew a test garment in a similar fabric to adjust your pattern.

Measurements may vary after adjustments. If using non-stretch fabrics, reference the approximate finished garment measurements chart to choose your size.

Note: Always read all the instructions before cutting the fabric!

How to Sew The Chamonix Color Block Sweatsuit

The instructions provided below are designed to guide you through sewing the Chamonix Color Block Sweatsuit from start to finish.

3 Tips for Sewing with French Terry

⇒ Use a stretch stitch, lightning stitch, or very short straight stitch (about 1.5 millimeters) when sewing all the pattern pieces together to allow the fabric to stretch after its sewn.

⇒ Use a ballpoint or stretch needle when sewing with French Terry to avoid pulls and skipped stitches.

⇒ Make sure when cutting out your pattern pieces that the stretch direction of the fabric is oriented the same way on all the pattern pieces. You want the sweatsuit to stretch horizontally more than vertically.

Pattern Pieces & Fabric Cuts Needed

• (A) TOP UPPER
  • Fabric – Cut 2 Mirrored
• (B) TOP LOWER
  • Fabric – Cut 2 Mirrored
• (C) TOP LEFT SLEEVE
  • Fabric – Cut 2 Mirrored
• (D) CUFFS
  • Fabric – Cut 2
• (E) SHOULDER STRAP
  • Fabric – Cut 1
• (F) PANTS FRONT SIDE
  • Fabric – Cut 2 Mirrored
• (G) PANTS FRONT CENTER
  • Fabric – Cut 2 Mirrored
• (H) PANTS BACK SIDE
  • Fabric – Cut 2 Mirrored
• (I) PANTS BACK CENTER
  • Fabric – Cut 2 Mirrored
• (J) POCKETS (A)
  • Fabric – Cut 2 Mirrored
• (K) POCKETS (B)
  • Fabric – Cut 2 Mirrored
• (L) PANTS WAISTBAND
  • Fabric – Cut 1

Sew with a 1/2″ seam allowance for all seams unless otherwise specified.

Step 1 

BACK SIDES

1. Place the back side pieces right sides together with the back center pieces with the sides lined up.
2. Pin and sew the back sides to the back center pieces.
3. Unfold the back sides from the back center and press the seams open.

Step 2

FRONT SIDES

1. Repeat the same process from step 1 for the fronts of the pants.

Step 3

FRONT SIDE SEAM POCKETS

1. Place the front pockets (pocket A) right sides together with the sides of the front pants.
2. Pin the diagonal edge of the front pockets to the diagonal edge of the front pants side seams.
3. Sew over the pins.
4. Unfold the pocket and press the seam open.

Step 4

BACK SIDE SEAM POCKETS

1. Repeat the same process from step 3 for the back pants pieces and B pocket pieces.

Step 5

SEW SIDE SEAMS

1. Place the front and back pants pieces right sides together with the pockets and side seams overlapping each other.
2. Pin around the pockets and down the side seams on both legs.
3. Sew around the pockets and down the side seams.
4. Press the side seams open and flat.

Step 6

TOPSTITCH POCKETS

1. Fold the pockets so that they are tucked flat on the inside of the pants.
2. Pin and sew the top of the pocket bag to the waistline of the pants.

Step 7

CROTCH SEAMS

1. Fold the pants right sides together so that the front and back crotch seams are lined up.
2. Pin and sew the back crotch seam.
3. Pin and sew the front crotch seam.

Step 8

INSEAM

1. Fold the pants so that they are right sides together with the front and back inseams and crotch seams lined up with each other.
2. Pin and sew the entire crotch seam.

Step 9

WAISTBAND

1. Fold the waistband short ways so that the two short ends are touching, right sides together.
2. Sew a straight stitch along the short overlapping ends of the waistband to create a closed loop.
3. Fold the waistband in half, wrong sides together, so that the right sides are facing the outside on both sides of the waistband.
4. Sew a piece of elastic that is the size of your waist into a closed loop.
5. Sandwich the elastic into the inside of the waistband.

Step 10

ATTACH WAISTBAND

1. Evenly pin only the fabric part of the waistband (not the elastic) to the waistline of the pants, right sides together.
2. Sew all the way around the waistband to attach it to the waistline of the pants.
3. Topstitch two evenly spaced lined over the elastic waistband, stretching the elastic as you sew.

Step 11

HEM PANTS

1. Press a 1 inch fold into the bottom hem of the pants.
2. Sew over the fold with ⅞ inch seam allowance.

Step 12

DIAGONAL SEAM

1. Layout the sweatshirt upper and sweatshirt lower pieces so that the diagonal edges are lined up with each other.
2. Sew the diagonal edges right sides together for both the front and back sweatshirt pieces.
3. Unfold the seam and press it open.

Step 13

SLEEVES

1. Place the sleeve extension right sides together with the shorter of the two sleeves on the sweatshirt.
2. Pin and sew the sleeve extension to the sweatshirt.
3. Repeat for both the front and back sweatshirt pieces.
4. Press the sleeve extension seam open and flat.

Step 14

SIDE SEAMS

1. Place the front and back sweatshirt pieces right sides together.
2. Pin the side seams from the end of the sleeve through the armpit to the hem of the sweatshirt.
3. Pin the tops of the sleeves and shoulders, leaving an opening for the neckline.
4. Sew the side seams, sleeve inseams, and shoulders.

Step 15

CUFFS

1. Fold the cuffs in half right sides together with the two shorter ends of the rectangles touching each other.
2. Sew a straight stitch to connect the two short sides and make two closed loops.
3. Fold the cuffs wrong sides together so that the right side is facing out on both sides of the cuff.
4. Pin the raw edges of the cuffs to the raw edges of the sleeves, right sides together.
5. Sew the cuffs to the sleeves, stretching the fabric as you sew. 
6. Flip the cuffs right sides out.

Step 16

HEM RAW EDGES

1. Fold and press a ½ inch fold into the neckline of the sweatshirt.
2. Sew over the neckline fold with ⅜ inch seam allowance.
3. Fold and press a 1 inch fold into the hem of the sweatshirt.
4. Sew over the hem with ⅞ inch seam allowance.

Step 17

STRAP

1. Fold the strap long ways, right sides together.
2. Pin and sew the long end of the folded strap to create a tube.
3. Flip the tube right sides out and press the seam flat.

Step 18

ATTACH STRAP

1. Pin one end of the strap to the back neckline.
2. Topstitch over the strap at the back neckline.
3. You now have the choice to make the strap removable or permanently sew it. If you want it to be permanently sewn, just repeat the previous 2 steps in step 18 but for the front of the sweatshirt and strap. If you want to make it removable, read the next step.
4. To make the strap removable, you have to use a fastener of some kind in the front. I used hook and eye loops.
5. Hand sew the hooks of the hook and eye loops to the end of the strap.
6. Hand sew the eyes of the hook and eye loops to the inside hem of the neckline.
7. Hook the hooks into the eyes.

Sewing Success: The Completed Chamonix Color Block Sweatsuit

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