Size	AU/NZ	UK	US
XS	8A 8B 10A	30A 30B 32A	30A 30B 32A
Small	8DD 10B 10C 10D 10DD 12A 12B	30DD 32B 32C 32D 32DD 34A 34B	30DD 32B 32DD 32C 32D 34A 34B
Medium	12C 12D 12DD 12E 14A 14B	34C 34D 34DD 34E 36A 36B	34C 34D 34DD 34DDD 36A 36B
Large	14C 14D 14DD 14E 16A 16B 16C	36C 36D 36DD 36E 38A 38B 38C	36C 36D 36DD 36DDD 38B 38C
XL	16D 16DD 16E 18A 18B 18C 18D	38D 38DD 38E 40A 40B 40C 40D	38D 38DD 38DDD 40A 40B 40C 40D

Size	AU Size	UK Size	Waist (cm)
XS	04-06	00-02	60
Small	08-10	04-06	64
Medium	12-14	08-10	68
Large	16-18	12-14	72
XL	20-22	16-18	76
2XL	24-26	20-22	80

Size	Waist (cm)	Waist (in)
2XS / (Size 4/8)	53-56	21-22
XS / (Size 8/12)	57-66	23-26
Small	67-76	27-30
Medium	77-86	31-34
Large	87-97	35-38
Extra Large	98-107	39-42
2XL	108-115	43-45
3XL	116-125	46-49
4XL	126-133	50-52
5XL	134-143	53-56
6XL	144-150	57-59

Size	Waist (cm)	Waist (in)
4XS (Age & Size 3-4)	40-44	15-17
3XS (Age & Size 5-6)	45-51	18-20
2XS (Age & Size 7-8)	52-59	21-22
XS (Age & Size 9-11)	60-69	23-26
S (Ages & Size 12-14)	70-76	27-30

NiteKnit™ - Sleepwear Shorts - Bamboo Underwear

Sleepwear Shorts

Name: NiteKnit™ - Sleepwear Shorts
Brand: Step One
SKU: PJB-S-10335-1
Price: 65.0 AUD
Availability: InStock

$65

Cooling bamboo sleepwear that lets body heat escape.

4.7 (108)

Choose your style

Set Shirt Shorts

Colour Midnight Black

Size

Colour Midnight Black

Free shipping
30-night guarantee
Free travel pouch

Heat escapes micro-channel knit lets body heat escape, so you stop overheating at night.
6x more breathable than cotton, 3x more than polyester.
Moisture wicking pulls sweat away and dries fast, so you wake up dry.
Ultra soft & anti-odour skin safe, naturally anti-odour, resists pilling.

Description

NiteKnit™ is our new fabric engineered specifically for night-time comfort.

It's breathable, lightweight and soft, with an airflow-friendly construction that allows heat to escape naturally and helps the fabric feel comfortable as you move through the night.

The Sleepwear Bottom is available as a single — perfect if you want to mix, match or replace individual pieces from your set.

Fit & Fabric

Made from light weight drop needle fabric, 95% viscose and 5% elastane. The texture adds breathability and stretch, while the viscose gives a smooth, cool feel against the skin. The fit is relaxed and non-restrictive, designed for movement, not stiffness. Unlike standard cotton sleepwear, this fabric drapes naturally and maintains its shape after washing. Lightweight, moisture-wicking, and luxuriously soft, perfect for everyday comfort and rest.

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.

30-Night Guarantee

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

Size chart

Waist (cm)

Measure around your natural waistline, tape snug but not tight.

On a line or between sizes? Size up. Tap a row to select that size.

Better sleep starts with cooling.

Fabrics that trap heat wreck your sleep. Founder Greg Taylor set out to fix it. The result was NiteKnit™.

Scientific sources

Van Someren EJW. More than a marker: Interaction between the circadian regulation of temperature and sleep. Journal of Sleep Research. 2000;9(3):269–277.
Haskell EH, Palca JW, Walker JM, Berger RJ, Heller HC. The effects of high and low ambient temperatures on human sleep stages. Sleep. 1981;4(1):7–12.
Harding EC, Franks NP, Wisden W. The temperature dependence of sleep. Physiology & Behavior. 2019;188:55–62.

Heat escapes

Micro-channel knit lets body heat escape, so you stop overheating at night.
6x more breathable

6x more breathable than cotton, 3x more than polyester.
Moisture wicking

Pulls sweat away and dries fast, so you wake up dry.
Ultra soft & anti-odour

Skin safe, naturally anti-odour, resists pilling and wear.