Big sister energy, in the softest bamboo.

Baby’s turning one, and big sis deserves a spotlight too. Our Holy Cow I’m Sister print has soft grey cow spots, a smiling little cow wearing a pink bow, and “Holy Cow I am Sister” in pink lettering. Pink ribbing at the neck, cuffs and ankles finishes the look. She can wear it on party morning, for the cake smash photos, and for every sleepover after.

The set is a long sleeve top with matching long pants, cut from our 95% viscose from bamboo and 5% spandex fabric. It’s buttery-soft and gently stretchy, and it breathes, so she stays comfortable through the whole night without overheating. The soft elastic waist moves with her, whether she’s climbing, twirling or sprawled sideways across the bed.

Why you’ll love it:

• Big sister print made to match baby’s Holy Cow I’m One outfit
• Buttery-soft, breathable bamboo that’s gentle on sensitive skin
• Long sleeves and long pants for cozy year-round sleep
• Soft, non-binding elastic waist
• Sizes 12–18M up to 16–18Y, so toddler sisters and big kids can both match

Good to know:

• Fabric: 95% viscose from bamboo, 5% spandex
• Fit: snug and stretchy, the way bamboo sleepwear is meant to fit. Between sizes? Go up one.
• Care: machine wash warm with similar colors, tumble dry low or line dry in shade

Complete the family set: dress the birthday baby in the Holy Cow I’m One pajama set, zippy or star suit, and Mom can match too in the Holy Cow I’m Mama pajamas. Shop the whole Holy Cow I’m One collection.