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Short-Sleeve Pajama Set in TENCEL™ - Astro Explorers
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Short sleeves and wicking fabric: summer pajamas that keep the night from getting sticky.
Rockets, astronauts, UFOs — and one very small space explorer about to fall asleep.
Short sleeves on top, long pants below — the set for warm 72–78°F summer nights, when a full sleeper is too much but you still want the legs covered.
Why a two-piece set. Short sleeves up top, long pants below: the set for warm nights when a full sleeper is too much but you still want the legs covered.
Material. TENCEL™ Lyocell with a touch of spandex for stretch. TENCEL™ is the wood-pulp fiber Lenzing spins in a closed-loop process that recycles 99% of its water and solvents, certified to OEKO-TEX Standard 100. It's softer than cotton and keeps its shape through heavy washing — the pajamas your baby still has at 18 months are TENCEL™.
The print. Soft pink ground with multicolored rockets, astronauts, flying saucers, planets, moons, and small stars.
Construction. A two-piece set: a tagless top and a pull-on pant with a soft, non-binding waist. No zippers and no snaps — the set for the stage when the baby helps get dressed.
When to choose short-sleeve. Above 75°F nursery overnight, the short-sleeve set is the right weight either under a 0.5 TOG muslin sleep bag or alone if the toddler is past sleep-sack age and the room is genuinely warm. Below 75°F, the long-sleeve set is the better pairing.
Adjacent products. Pair with a 0.5 TOG muslin sleep bag for the under-layer/over-layer combo that handles a 78°F nursery. For mobile toddlers in warm rooms, the 1.0 TOG TENCEL™ sleepsuit on a cooler night transitions back to short-sleeve pajamas alone on a warm one. Browse the full pajama and sleeper collection for matching prints.
Sizing. 12–18M, 18–24M, 2T, 3T, 4T. True to size.
Care. Machine wash cold and tumble dry low. Don't bleach, and don't iron the printed areas. Baby laundry runs two or three cycles a week, and TENCEL™ holds its surface through all of them.
Safety & certification. AAP safe-sleep compliant. Tested to CPSC, CPSIA, and ASTM standards. Material certified to OEKO-TEX Standard 100. Loulou Lollipop is a Certified B Corporation.
Common questions
Are TENCEL™ pajamas better than generic bamboo pajamas?
For longevity, yes. TENCEL™ keeps its surface through repeated, heavy laundering. Pajamas get washed more than anything else in the nursery, and TENCEL™ Lyocell keeps its surface through that schedule. The pajamas your baby still has at 18 months are TENCEL™.
What temperature should baby's pajamas be?
Pajamas are the under-layer, not the sleep system. Match weight to the room: long-sleeve TENCEL™ under a 1.0 TOG bag for 69–75°F nurseries, short-sleeve under 0.5 TOG for 75–81°F, sleeper under 2.5 TOG for 61–68°F. The bag handles the warmth for you.
Why fold-over cuffs?
Newborn nails grow faster than any trimming schedule, and the face is the first thing they find. Fold-over cuffs cover the hands without mittens that fall off. By 4–6 months the hands want out — fold the cuffs back and let them work.
Browse all TENCEL™ baby pajamas & TENCEL™ sleepers.
Free US shipping over $65. Free 30-day returns on unworn items in original packaging.
Why we recommend TENCEL™
Moisture Wicking
Non-Toxic & Safe
Ultra-Soft On Baby’s Skin
All sleepwear should fit snuggly. The following chart is for reference only. Please reach out to our customer service team if you have any questions on the sizes.
| Size | Height (in) | Weight (lb) |
|---|---|---|
| 0 - 3 M | 19" - 23" | 7 - 12 lbs |
| 3 - 6 M | 23" - 27" | 12 - 17 lbs |
| 6 - 12 M | 27" - 29" | 17 - 22 lbs |
| 12 - 18 M | 29" - 31" | 22 - 27 lbs |
| 18 - 24 M | 31 - 33" | 27 - 30 lbs |
| 2T | 33 - 36" | 30 - 33 lbs |
| 3T | 36" - 39" | 33 - 36 lbs |
| 4T | 39" - 42" | 36 - 40 lbs |
| 5T | 42" - 45" | 40 - 44 lbs |
| 6 | 45" - 48" | 44 - 50 lbs |
Why Parents Love This
Cool & Comfy
Soft, breathable fabric with a stretchy foldover waistband — designed for warm-weather sleep.
All-Night Comfort
Lightweight fabric stays cool so they're not waking up hot at 2am.
Made for Sensitive Skin
Flat seams and zero tags — nothing rubbing against their skin while they sleep.
Easy Care
Machine washable and dryer safe.
Cool & Comfy
Soft, breathable fabric with a stretchy foldover waistband — designed for warm-weather sleep.
All-Night Comfort
Lightweight fabric stays cool so they're not waking up hot at 2am.
Made for Sensitive Skin
Flat seams and zero tags — nothing rubbing against their skin while they sleep.
Easy Care
Machine washable and dryer safe.
94% TENCEL™ Lyocell, 6% spandex
Machine wash cold with like colours
Delicate or gentle cycle
Tumble dry on low heat
Use only non-chlorine bleach
Iron medium
Do not dry clean