Junior Trunk - Snowballs - Bamboo Underwear
Junior Trunk - Snowballs - Bamboo Underwear
Junior Trunk - Snowballs - Bamboo Underwear

Junior Trunk

$13

The Step One trunk, sized for kids.

4.7 (42)

Shop for

Boys Trunks Girls Shorties

Size

Colour White

1
  • Free shipping
  • 30-day First Pair Guarantee
  • Organically grown bamboo viscose soft and breathable
  • 30-day First Pair Guarantee love them or they're free
Description

The ultimate underwear for boys aged 6-14, our trunks are made with all the same high-quality features as our adult collections. Sized from 2XS to S, they are available in a range of fun colours and prints and feature our classic fabric which wicks away sweat and lets you breathe.

Shipping

We aim to dispatch your order 1-2 business days after placing your order.

Free shipping, no minimum spend.

NSW, VIC & QLD: approx. 1-3 business days after dispatch. WA, NT, TAS: approx. 2-4 business days after dispatch.

Returns & Guarantee

We are so confident you'll love your Step Ones, we'll give you a full refund on your first pair if you don't like them for whatever reason, within 30 days.

Unworn items in original packaging can be returned or exchanged within 30 days of delivery.

  1. 30 Day First Pair Guarantee

    Not sure what size to get your child? No stress. Our 30 day first pair guarantee means there's no guessing when it comes to sizing and comfort.

  2. Ultra soft material

    Made from viscose made from bamboo, our designs are super soft and comfortable. Happy kids mean happy parents!

  3. Safe for sensitive skin

    Our bamboo material is naturally hypoallergenic and antibacterial, meaning all kids have to worry about is where they are going to play next!

Real Results from Real Customers

What customers say about Step One.

Rated 4.7 out of 54.7 from 42 reviews of this product

30-day First Pair Guarantee

Love them or they're free. If your kids don't love their first pair, we'll give you a full refund.

Shop Step OneLearn more

Frequently Asked Questions

What is Step One kids underwear made of?

Our kids range is made from high-quality, organically grown Bamboo Viscose with a touch of spandex. It's incredibly soft, breathable, and moisture-wicking — no itchy tags or scratchy seams.

Is it suitable for sensitive skin?

Yes! Bamboo viscose is naturally hypoallergenic and antibacterial, making it gentle on even the most sensitive skin.

What sizes do they come in?

The Girls Shortie comes in Ages 6-7 through to Ages 12-14, and the Junior Trunk covers Ages 2-3 through to Ages 12-14. Use the Find my Fit guide on this page to match your child's measurements to the right size.

How does the First Pair Guarantee work?

We are so confident your kids will love their first pair of Step One underwear that if they don't, you can keep them and we'll give you a full refund. No questions asked. This applies to your first single pair purchase.

How should I wash them?

Machine wash cold with like colors. Tumble dry low or line dry in the shade. Do not bleach, iron, or dry clean to maintain the quality of the bamboo fabric.