Thelon 2-Piece Swim Set

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The Thelon 2-Piece Swim Set includes a slim-fitting swimming Shirt/Rashguard that features contrasting panels on the side and upper chest and the option of short sleeves with wide cuffs or long sleeves with a unique angled stripe, and coordinating knee-length swim Jammers with side panels and a saddle gusset.

This Set is also available to purchase as swim separates.  Buy only the Thelon Swim Shirt, or the Thelon Swim Jammers.

This is a non-gendered pattern including a new EXTENDED size range, from kids size 2-10 plus four additional teen/tween sizes.  And optional shelf bra is included in the swim shirt/rashguard in the upper size range.

Recommended Skill Level - Beginner-Intermediate - Experience sewing with stretch fabrics is recommended.

Seam allowance is 3/8"(1cm) unless stated otherwise in the pattern, and is included in all measurements.

Required Supplies: sewing machine, stretch needle, 3/4" elastic for waistband and the optional shelf bra, ballpoint pins or wonder clips, scissors and/or rotary cutter, measuring tape and/or cutting mat & ruler.
Suggested Fabric: Swim knit with minimum 60% stretch (fabric content 18%-20% spandex/Lycra), swim lining for the Jammers and the optional shelf bra.  


Included in the pattern:
  • EXTENDED SIZES!  Size range includes 2, 3, 4, 5, 6, 7, 8, 10, A, B, C, D (tween/teen sizes).
  • Cutting charts & pattern pieces for all rectangular parts.
  • Easy to assemble pattern pieces.
  • Clear and efficiently nested pattern pieces, color coded by size.  All colors also print clearly in black ink.
  • No layers (individual size printing) on print-at-home or Large Format; Layers ARE included on Projector Files.
  • All measurements in both metric and imperial
  • Sizing guide including body measurements to help obtain the proper fit for the child. 
  • Specific instructions on customizing & blending sizes.
  • Line drawings showing all options.
  • Interactive table of contents, for reference and ease of use on digital devices.
  • Fabric requirements for all parts.
  • Supplies and suggested fabrics list.
  • Full color photo tutorial with written (English only) details for each step.
  • Hints and tips throughout the tutorial.
  • Summary of steps for quick reference.
  • Modeled photos showing the finished options.

Purchase also includes AO Large Format PDF for copy shop printing, and Projector optimized file.  Print-at-home and Large Format files have nested pattern pieces (no layers); Projector file has layers (ability to turn on and off individual projected sizes), optional "unfold" layer for Cut-on-Fold pattern pieces, & inverted black-background section which also includes mirrored pattern pieces.

NOTE: This product is a sewing pattern, not a completed garment.

3 Reviews Hide Reviews Show Reviews

  • 5
    Thelon 2-piece swim set

    Posted by Varna on 2022 Jun 26th

    This is a "must have" pattern for all of you swim and athletic needs. depending on the fabric you choose, it can be a workout set, or a rash guard, or a swim top & bottom or hack it for a swim dress like I did for my modest granddaughter. She was very pleased with the optional shelf bra she said, "It helps me not be so self-conscious".

  • 5
    Love it!

    Posted by Karen Weber on 2022 Jun 25th

    This set is super cute! The instructions are fantastic. I love how Heidi includes tips and tricks for a better sewing experience.

  • 5
    Awesome look

    Posted by Marianne on 2022 Jun 25th

    Can't wait to sew it

In Canada’s far north runs the longest river that empties into Hudson Bay, the Thelon.   Meandering through the traditional lands of the Dene and Caribou Inuit people of the Northwest Territories and Nunavut, the Thelon River basin includes areas designated as a Canadian Heritage River as well as a 52,000 square kilometer Wildlife Sanctuary. 


While paddling down the river, visitors are surrounded by sand flats and tundra hills, where the undisturbed wilderness allows for incredible wildlife sightings including Muskox, Caribou, and Arctic Fox.