Short-Sleeve Pajama Set in TENCEL™ - Mini Mathletes

Cool, dry, and free to move — so a warm summer night does not end in a sticky 2 a.m. wakeup.

Alligators on swings, elephants, kites, hopscotch — playground math.

Short-sleeve top and shorts in TENCEL™ Lyocell. The summer-weight two-piece pajama for toddlers past the one-piece phase. For warm nurseries at 75°F and up, or for the months when the household AC is set generously.

Why TENCEL™ here. We choose the fiber by the job. For a piece worn close to the skin and washed often, we use TENCEL™ Lyocell — it keeps its softness and shape through repeated laundering and moves heat and moisture off the skin. For our lightest warm-weather pieces — muslin swaddles, 0.5 TOG sleep bags, and crib sheets — we choose Tanboocel® Bamboo Viscose muslin, because an open muslin weave breathes best in the heat. Two premium fibers, each picked on purpose.

Material. TENCEL™ Lyocell with spandex for movement. Wood-pulp fiber from Lenzing, closed-loop production, OEKO-TEX Standard 100 certified. Pulls moisture off skin faster than cotton — which is what you want at 3 a.m. on a humid summer night when the baby is rolling between damp pajama and bare-leg sleep. The fiber holds its hand and surface through repeated washing, which matters because the summer set goes through the wash more often than any other piece in the rotation.

The print. Cream ground with alligators on swings and seesaws, small elephants and pink bunnies, kites being flown by our Wolfie, hopscotch grids, balloons, small numbers, clouds, and trees.

Construction. Short-sleeve crewneck top with elastic-waist shorts. Tagless inside the neck. Flat seams that don't catch the skin during sleep. Cuffed sleeves and short legs that sit just above the knee. Designed to fit through at least one growth phase — sized with a little extra length so the legs don't ride up by month two.

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, tumble dry low. The short-sleeve set dries faster than the long-sleeve — usually 30 minutes on low. Do not bleach. Do not iron printed panels.

Tested and certified. Fabric carries OEKO-TEX Standard 100 certification. Garment passes CPSC, CPSIA, and ASTM safety testing. Built around the American Academy of Pediatrics safe-sleep guidance. Independent B Corp Certification on the brand.

Browse all TENCEL™ baby pajamas & TENCEL™ sleepers.

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