Why kids' underwear waistbands can feel uncomfortable

The waistband is the part of a pair of underwear that has to do a job. It has to hold the garment in place without being noticed. There is more than one way to build one, and the choice changes what sits against a child’s skin all day. Here are the four approaches, and which one we use.

Four ways to build a waistband

Edge-on view of the two-layer waistband on Primal Play boxer briefs
  Exposed elastic strip Fabric-encased elastic strip Single-layer self-fabric Two-layer self-fabric (Primal Play)
Separate elastic component Yes Yes No No — no separate elastic tape or strip
Material against skin Elastic Fabric Garment fabric Garment fabric
Band construction Elastic strip Elastic wrapped in fabric One fabric layer Two fabric layers
How the band is cut n/a n/a Varies Cut on the cross grain, and cut slightly shorter than the body so it is eased into place
Finished band height Varies Varies Varies 3.00 cm, every size
Construction published Yes — see below

Exposed elastic strip

Separate elastic component
Yes
Material against skin
Elastic
Band construction
Elastic strip
How the band is cut
n/a
Finished band height
Varies
Construction published

Fabric-encased elastic strip

Separate elastic component
Yes
Material against skin
Fabric
Band construction
Elastic wrapped in fabric
How the band is cut
n/a
Finished band height
Varies
Construction published

Single-layer self-fabric

Separate elastic component
No
Material against skin
Garment fabric
Band construction
One fabric layer
How the band is cut
Varies
Finished band height
Varies
Construction published

Two-layer self-fabric (Primal Play)

Separate elastic component
No — no separate elastic tape or strip
Material against skin
Garment fabric
Band construction
Two fabric layers
How the band is cut
Cut on the cross grain, and cut slightly shorter than the body so it is eased into place
Finished band height
3.00 cm, every size
Construction published
Yes — see below

How ours works

Close-up of the folded self-fabric waistband on Primal Play boxer briefs

Ours is the fourth kind. The band is two layers of the same fabric as the rest of the garment — 90% modal, 10% spandex — folded and stitched, with no separate elastic tape or strip inside it.

Two things make that work. The first is the direction of the cut. A knitted fabric stretches more across its width than along its length, so the band is cut on the cross grain, where the give is. It stretches to go on and comes back to its own shape rather than staying stretched.

The second is easing. The band is cut slightly shorter than the body of the garment it is sewn to, then eased into place as it is attached. That small difference is what keeps the band against the body: the fabric is already under a little tension when the garment is lying flat, so it sits close without being pulled tight.

The finished band is 3.00 cm tall on every size, 2T to 14/16.

What we don’t claim

A fabric waistband isn’t new. Flat seams aren’t new. Modal isn’t new. Other brands make good underwear for sensitive kids, and some of them make it much the same way we do.

What we can tell you is exactly how ours is built — the number of layers, the direction of the cut, the finished height in centimetres, which seams exist and which don’t. Most brands don’t publish that, so you’re left comparing adjectives.

We’d rather you compared construction. That’s why it’s on this page. We say modal, not bamboo, because that’s what the fibre is. We don’t say revolutionary or ultra-soft, because those don’t tell you anything you can check.

The specification

  • The waistband contains no separate elastic tape or strip.
  • It is two layers of the same 90% modal, 10% spandex fabric as the garment, cut on the cross grain.
  • The finished band is 3.00 cm tall in every size, 2T to 14/16.
  • There is no side seam and no centre back seam on the boxer briefs.
  • The care label is heat-printed inside the garment, not sewn in.
  • The fabric is knitted to 185 gsm.

Start with one pair. If your child keeps it on, come back for the three-pack.