Pure Box Kids’ Thermal Baselayer – Winter-Ready Comfort & Performance

Keep your little adventurers cozy and dry with our high-performance kids’ long sleeve baselayer, designed for active winters. Crafted from 250gsm stretch fabric, this breathable layer regulates body temperature while wicking moisture away for quick drying—perfect for snowy playdates or chilly mornings.

Why Parents Love It:

✔ All-day comfort: Flatlock seams prevent chafing for irritation-free wear
✔ Durable & easy care: Machine-washable fabric maintains shape wash after wash
✔ Visibility + style: Bold Pure Box chest/back logos make layering fun
✔ True-to-size fit: Four youth sizes (5-6Y to LYXLY) with stretch for growing bodies

Pro Tip: Unsure about sizing? Measure your child’s chest and compare to our size chart—or call 01708 320320 for personalized help.

Note: Custom prints (names/initials) are final sale. Delivery timelines vary—check our policy page for details.
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(Word count: 180 – Optimized for “kids thermal baselayer,” “winter long sleeve base layer,” and “moisture-wicking children’s clothing” without repetition.)