S	M	L	XL	2XL	3XL
Width, cm	48.77	52.83	56.90	60.96	65.02	69.09
Length, cm	66.04	69.09	72.14	75.18	78.23	81.28
Sleeve length, cm	64.01	66.04	68.07	70.10	72.14	74.17
Size tolerance, cm	2.54	2.54	2.54	2.54	2.54	2.54

This vintage-inspired letterman jacket brings collegiate flair to the modern lab bench. Soft, garment-dyed cotton and crisp contrast sleeves give it that lived-in look from day one. The back wears a bold “Just A Peptide Mama” graphic with playful hand-lettering — a proud, tongue-in-cheek badge for scientists, grad students, and lab parents who balance pipettes and playdates. A small chest emblem keeps the design wearable for campus strolls, conferences, or coffee breaks between experiments. Lightweight enough for layering, it slips over hoodies or lab tees and carries well from the lab corridor to a weekend study group. It’s a confident, cozy way to celebrate lab life with personality and humor.

Product features
- 80% ring-spun cotton / 20% polyester blend for a soft, durable feel
- Garment-dyed construction for a vintage, broken-in color and texture
- Medium-heavy 330 g/m² fabric weight for warmth without bulk
- Available in 12 color combinations; contrast sleeves and striped ribbing
- Made in the USA (materials globally sourced) with a sewn-in label

Care instructions
- Machine wash: cold (max 30C or 90F), gentle cycle
- Tumble dry: gentle cycle, low heat
- Do not iron
- Do not dryclean